That's a myth fed to the PR department. It's simply chasing short term profits and not thinking about the future. That's how shareholders operate. A parent isn't going to drop $500 on the next PS hardware because their kid played Astro on their cheap Nintendo potato.
And it's funny how this is always a one way street. I don't see any demands for Nintendo or PC games on PS. But Sony definitely needs to port all of theirs.
And they're dumb enough to do it.
If the Switch 2 is significantly less successful than the Switch and it very well could be, I wouldn't be surprised if you end up seeing some Nintendo games on PC and potentially even PS5.
Nintendo's major saving grace right now is their lower budgets, but as they ramp up development on Switch 2 titles, there's a very good chance that these games end up taking much longer to develop. That is unless they still make games for Switch and treat Switch 2 as a Pro model and try to get more 3rd party support, but keep their games largely as Switch games.
You're largely confused because you don't realize that Nintendo has significantly different fundamentals as Sony.
Nintendo has not only a 10 year head start on Sony in terms of brand recognition, but Sony didn't get serious when it comes to first party development until around 2005...
God of War came out in 2005 and Uncharted came out in 2007.
But there's also a major difference between these types of games and the games Nintendo makes. Nintendo can recycle its games more easily and they're cheaper and easier to produce and generally still sell better.
Sony is on a knife's edge because their console pushes graphical power and the games push graphical power, but that prices out families and kids, which is where Nintendo is cleaning up.
In order to sustain and grow, Sony needs more revenue. Where does that revenue come from? You and others think they can get there simply by doing more of the same, but it's not true.