On the contrary, some big companies have reported recently that their games are selling very well on PC, especially compared to 10 years ago, when there was zero incentive for companies to release and / or port games for PC.
Also, making games becomes simpler every year. 10 years ago you had to learn Game Maker, or use some outdated, simplistic version of RPG Maker. Now even some big engines offer visual scripting, or blueprints, for those less inclined towards programming.
If anything games made by smaller teams will become more and more popular with time. There is a lot more freedom and creativity when devs are not held down by shareholders. That is not to say there is no creativity in the AAA industry, but those games tend to be a lot more... sterile, so they can appeal to wider audiences. Meanwhile, small devs HAVE to focus on precise audiences, we just can't attempt to please everyone.
Also, lots of people were influenced by solo devs and small teams who released fantastic games in the past decade. ConcernedApe (Stardew Valley), Scott Cawthon (Five Nights at Freddy), Toby Fox (Undertale), the two dudes who made Nuclear Throne, the list goes on.
RPG Maker games aren't going to anywhere, just look at Omori. I also think She Dreams Elsewhere will sell pretty nicely, and so will my game (modesty? what is that?). I can see RPG Maker fading away once more robust engines heavily improve on their visual scripting and similar approaches to making games.
I also don't think devs working for big companies make that much money, save for those in top positions such as the game director or people with years, decades of work on their portfolios.
Your post sounds like bait, but I felt like it was good opportunity to voice some thoughts.