More people buying and enjoying your games... that's sound very good to me. I know many friends who are diehard PC gamers, I am happy that they could experience the amazing line-up of PlayStation games on their PCs.
PC is an open platform. In my opinion, it is a superior platform in many ways. I do love Playstation (have all of them, not yet a ps5) and console(s) can also be better in some other ways.
I don't think this strategy will cannibalize the brand and market, look at XBOX. It may very well expand your audience even more than it could ever achieve in a closed ecosystem. We are heading towards cloud gaming anyway...lol