This is bullshit.
Everybody has a PC because they needed it to communicate with the outside or for work or for school etc. Telephones and tablets replaced that solution. So that market dissapeared for PC.
When digital store front wasn't a thing on PC, most devs jumped over towards consoles because single player department of gaming was dead on PC. PC moved towards online multiplayer games and most of these company's where stuck in there old ways and didn't wanted to shift over but instead keep making the same shitty single player games nobody cared for anybody on PC. And the ones that did care where hit by piracy heavily.
Also company's like sony and nintendo started to heavily invest into developers to bribe there titles ( microsoft also ) towards there platform in order to set it apart and make it sell which killed of this market entirely for PC or mostly. Digital shops however reversed this in the recent decade again.
PC gets pretty much all the single player games now, but also has a huge own library of games that all revolve around competition and online solutions. The biggest titles of the last decade are all PC titles and dwarf the console user base massively.
So what you saying here is complete bullshit.