Why console crossplay will mean nothing in the long run

[KLAMarine]

d21lewis said:
So here's what I've gathered:
-Sony doesn't allow cross play with any other platform except PC sometimes.
-If you make a Fortnight account, your purchases are stuck on PS4 but the other platforms allow you to switch back and forth, leveling up, keeping your purchases, etc.
-Microsoft won't let you play F2P games online without a subscription. PS4 does allow you to use their online service for F2P games.

A.)Either Microsoft is wrong for requiring the subscription or Sony is really generous.
B.)Either Sony is (are?) being selfish by not allowing people to keep their content or Microsoft/Nintendo/PC are being generous with this one particular game.
C.) Sony is being selfish by not allowing people to play popular games like Rocket League and Fortnight with gamers of other platforms.

We have a couple of different issues here. People seem to be using the logic that "It's okay because it doesn't effect me and my enjoyment" or "It's okay if my company does something wrong because this other company does something entirely different that is also wrong."

Do I have this right?

Microsoft and Nintendo are by no means perfect but I think the Fortnite debacle has really pissed some off and Sony is the one getting hit the hardest. Rightfully so, I'm not fond of it either to say the least...