>>723444495 (OP)
It's because certain games population were effectively DOA without crossplay with console. CoD used to be a major one. Majority of people used to play on console until they implemented crossplay. Sports games are the same way, it wasn't until this year that sports games actually get the "next gen" version of sports games...the 24, 23, 22 versions of sports games like Madden and NBA 2K were still the old PS4 8th gen version of the game, which is just crazy because most PCs can obviously handle next gen titles. Funnily enough though, sports games are the only games that support console only crossplay. NBA 2K, Madden, FIFA, NHL, Undisputed, etc are the only games I'm aware of that allow PS vs Xbox, but not PC.
TL,DR devs are just fucking retarded. I would prefer console only crossplay for competitive games and then total crossplay for everything else but again devs are shit brain retards, so go figure.