Are you reading what you're replying to? Because your replies aren't making sense in any context to what is being said.

"When compared with a breakdown of 15m plus Iceborne across 3 platforms the 6.3m of 3DS is in line with what MHW sold on each platform"

It is not.

The data for Japan is incomplete as there is an enormous amount of digital data missing for 3rd party titles. So we never get a full sense of how well any of the games did. Any game post 2017 where Sony was reporting 35%+ for digital per quarter is suspect from Famitsu or Media Create.

And as Farsala mention, we don't know what the ceiling for MHW is, it is above and beyond higher than anything that Capcom has done for previous Nintendo or Sony handhelds in terms of exposure, profit and brand expansion...peroidt.

6.3m and 6.9m are in line with each other's performance.

For the 3DS versions of MH, you are talking about 7 years worth of sales (MH4 was 9/14/2013), World in two years has surprised it and is continuing to sell, they are not comparable.

They are though as the 3DS games are all front loaded so those sales came with in the first few months if you look at sales 2 years after their releases they'd already had hit their LT total hence why another title would be released two years from the last, in 4U's case Generations came out the following year yet it still did 4.1m on top of MH4's 4.2m.

If you don't see how going from games selling 400-500K on PS3 to not having a single game on the PS4 with over 200K sales is problematic, I don't know what to tell you. PS4 performance is similar to PSV performance, which is weak to begin with. You can disagree all you want but you've not presented a single argument how they are following a winning strategy for Japan. 

So their lack of focus on the Switch outside of games Nintendo is basically paying them to make/port like Hyrule/Fire Emblem Warriors isn't exactly groundbreaking. 

If you want to see a publisher taking the Switch seriously look no further than Bandai Namco who have 8 games sell over 100K on the Switch and 2 games that have sold over 400K. Compare that to the PS4 which has 13 games that sold over 100K but only 4 have surpassed 200K sales. With Captain Tsubasa being the next title likely to have strong sales far beyond what Fairy Tail, Nioh 1/2 or the next Warriors game is going to sell in Japan.  

I still don't understand what you arguing, outside of Capcom & Square who actually have World Wide hits associated with Sony ecosystems the rest of the Japanese Publishers don't have a fallback plan. Still, it's a risky situation for them as well since a lot rides on how well future games in the Final Fantasy, Kingdom Heart, Resident Evil and Monster Hunter World do. But if those games are Playstation exclusives in the future, the current trend says that they are set to lose more ground on their home market. 

Putting Monster Hunter on PS4/Xbone/PC for World was a good move that paid off.

What would be a very, very bad move however, would be discontinuing the series' long-running portable line. Since 2005 Monster Hunter has run two concurrent branches; home and portable. With the Switch on track to be one of the best selling systems of all time, it would be sheer foolishness not to continue the MH portable line on it.

The two are not mutually exclusive. They (and we) can and should have both.

People are making it seems like Monster Hunter World success completed obliterated the success the series had on handhelds.
Yes, overall sales way exceeded the handheld ones but people seem to forget that for the handhelds Capcom was able to release 3-4 per console generation. That is not and will not be the case with HD/console versions.
Development time is way too long compared to handheld versions.

Do I really have to spell it out...

017./000. [PS4] Dragon Quest Heroes: The World Tree's Woe and the Blight Below # <RPG> (Square Enix) {2015.02.26} (¥7.800) - 348.277 / NEW (269.303 <89,89%>)

091./000. [PS4] One Piece: Pirate Warriors 3 <ACT> (Bandai Namco Games) {2015.03.26} (¥7.800) - 80.266 / NEW (46.693 <71,30%>)

007./000. [3DS] Yo-Kai Sangokushi <SLG> (Level 5) {2016.04.02} (¥4.600) - 545.019 / NEW

016./000. [PS4] Dragon Quest Heroes II: The Twin Kings and Prophecy's End <RPG> (Square Enix) {2016.05.27} (¥7.800) - 259.001 / NEW

19./00. [NSW] Fire Emblem: Three Houses # <SLG> (Nintendo) {2019.07.26} (¥6.980) – 273.905 / NEW

15./15. [PS4] One Piece: Pirate Warriors 4 (Bandai Namco Games) {2020.03.26} (¥7.800) - 5.660 / 128.502 <80-100%> (-15%)
16./17. [NSW] One Piece: Pirate Warriors 4 (Bandai Namco Games) {2020.03.26} (¥7.800) - 5.621 / 110.457 <80-100%> (-5%)

These are all games made by Koei Tecmo. Some games sold over 500k, they are clearly doing fine. If they weren't using their dev power to make games for other publishers, they would simply make and release their own games.