With all the court documents and leaks we've come to see the most profitable part of PS/Xbox business comes from big games like COD and their MTX. Exclusives are an extra enticer to pick one console over the other and keep the user playing everything else there. On the other hand, you can't really say PC and Console players are the same costumers.
You yourself is a great example. You got a PS for the exclusives and plays everything else on PC. You are not a very profitable consumer to Sony, because they would rather have you playing COD, Fortnite, Destiny 2, etc; on the ps5. Their end costumers are the people from above who have one reason or another to use consoles over a PC for most games or all of them.
I think the issue here is that Sony dug their own grave with their exclusive strategy, long, long before they even thought of doing PC ports. For exclusives to work they would have to keep massively putting out new games like Nintendo does. However, unlike Nintendo, their game's appeal rely strongly on presentation, visuals, production value, etc; meaning budgets and dev times grow larger and larger as generations go by. There's no way they'd ever be able to keep a consistent output like that. Now they're changing strategies to make GAAS games, which means they must entice people on other platforms (that aren't direct competitors at least), thus the ports.
