He used to make games. He stopped making games to sell other people's games.
I get why people like Steam, but when people say you shouldn't play games that require other launchers, especially when all-in-one launchers like Playnite exist... I think people should get off his dick a bit.
The problem I have is that Valve used to make GREAT games. And there's so much trash and shovelware out there, it would be nice to see a good developer come back. The hope is that they will at least make good gaming hardware.