You would, like other enthusiasts that fit that minority.  However I am answering your question in terms of the general consumer.

I want to play God of War 5 and Horizon 2 for example, so I am getting a PS5 without question.  However seeing as how my PS5 will also be able to play all major games that come to PC, I see no reason to invest in one unless it is a significant leap ahead of the console I will already own.  But even then, it feels like a wasted investment to invest in such a beast of a machine.  With that in mind, I am just fine with a PS5 and Switch combo until it is no longer an option or Sony screws up so royally that I no longer want their games.

This is how the average consumer sees it, and that is the answer to your question of why we bother to buy consoles next gen.  And for the record I have the money for a sick gaming PC, I can get one at any time.  However seeing how I already have access to the games it would have to offer, I am not willing to part with those funds for the initial investment.  I am sorry if you have trouble understanding that, but it is how most consumers look at things when it comes to their purchases.

And there is nothing wrong with being an enthusiast, we all have our own values.  Just understand that you are the minority and just because you do not have a reason to buy a next gen console, that it does not mean most other people feel the same way.

As to say, help me find a reason to get one.  Not that I was against it, or anyone who thought against owning a PC.  That's why I re-wrote my initial post and included a picture of all my PS consoles so you couldn't label me as some PC elitist.

But, whatever.  I just bought a CECHA-01 PS3 last week.  It's the white one in the picture.  It has full backwards compatibility with PS2 games, I finally found one and got it.  You know what would make me interested in a PS5?  Backwards compatibility with all the previous consoles.

I just got a BC PS3, which covers my US released games.  I would import a PS5 if it had backwards compatibility for the sake of my Japanese PS1 & PS2 game discs being usable in true HD.  It would make my Japanese PS2 useless, but whatever.   I just want the hardware itself to be good.

So what's the ent plus for owning a beefy PC when what you said before holds true in your own eyes?:

That's twice you've put a net plus in a console/Sony's favor, where's the net plus/boon for owning the rig?. I know we have this little "goes without saying" thing until someone like me brings this up, but why does it even have to be that way?. I know we're going to get into some little kerfuffle because I just pointed this out, but I'd love to bypass that and simply get to the "why didn't you bring it up?". part, that is, if there is a boon/net plus to having a beefy rig, despite what you said earlier.

I wouldn't make a bold claim like that, if you're willing to understand that the PC userbase greatly outnumbers the console one, even in terms of "casual" users, and even then, the mobile market, which is catching up in terms of technological prowess, massively outnumbers console casuals as well. You'd understand that your market is the actual minority one. 

Then why do most core game sales come from console purchases?

You are trying to compare apples to oranges.

Shiken is correct. Console revenue was higher in 2018 than PC revenue. 

Of that year, not for the rest of time:

https://www.gamesindustry.biz/articles/2018-12-18-global-games-market-value-rose-to-usd134-9bn-in-2018

Also, mobile made even more, but if we're again limiting this to the sole aspect of just one gaming side of games (like the AAA argument) to benefit one side, then yes it becomes obvious, but why limit it to just one side?.

It's silly to say apples to oranges when both are within the same market and sell the same games. 

"boxed sales"; especially when that same site has pointed out how little to non existent PC's retail side is compared to their digital side, which has grown far, far bigger. Also another chart that's comparing just AAA games, while ignoring literally every other game type out there, isn't the way to go.

It is amusing to see the negligence of mobile sales though. 

Nope. That number includes digital. Take a closer look at the graphic. The PC has sections for "boxed and digital revenue", as well as "browser based games". They are including all revenue, not just AAA. 

Mobile is indeed booming. Not arguing against that at all. 

Exclusives and features.

"like Flower and Journey" - Woah! Slow down Sony. Don't give pc gamers everything so quickly!