If I want to play something and I already own that platform, why should I prevent myself from playing it because of its exclusivity?
Do you boycott Xbox, Playstation, Switch, DS etc. exclusives too?
What about Windows-only games that aren't on Mac or other systems? There are certainly thousands of those. Do you refuse to play those either?
And yes, there's this Arcade, but I have no interest in playing for something which is locked down to one platform.