You are including that the Wii wasn't successful in this and that the WiiU didn't have 3rd party support you know? Lines that on reading I think less of what the person knows about gaming outside of his own little projects in all honesty.
Read the OP, he said wii was not successfull to third parties he is probably right, wiiU had very poor 3rd party support too so he is right again.
Ubisoft alone sold 33.4 million copies of Just Dance on the Wii, that makes the statement incorrect. Tons of other companies struck gold on the system too, EA, Lucas,Sega, Warner, fuck it read for yourself the companies who have million sellers on the platform, million selling titles @ 480p in 2012, that is just printing money right there.
Like I said, what he said is only correct, if you don't actually know the facts or truth, sure if you read the OP as true then what he said is perfectly true, but this is the same man that thinks the Switch has 2GB of RAM in it and thinks that Ubisoft didn't make money from 33million sales of SD games on the Wii.
As for Wii-U third party support? you would have to have your eyes bolted closed to not have seen Arkam, Tekken, mass effect, skylanders, Just dance, assassins Creed, Sonic and others pouring onto the system during its first years, the console was basically a tech demo for what the Switch would be in 2017, people didn't buy it, third party dried up and rightly so, but that does not mean it was not there from the get go. It is like trying to say that you don't see a lot of people taking part in a marathon after the race is over and everyone has gone home.