That's not a fact! C'mon let's dial in the hyperbole around exclusives in the current situation.Absolute lie.
Exclusive push developers and constructors to push themselves beyond comfort, we're getting a mind blowing Zelda, a mind blowing Spiderman, Scalebound etc...
You need exclusives to define your console, and you need exclusives to keep offering unique experiences. Because they try to make them as good as possible to sell a console.
That Spiderman game would never be remotely as good if it were multi platform, it's a fact.
Sure an exclusive can exploit a system with system specific code but that's purely performance based. The gameplay is the same and with essentially identical input systems the experience is the same too across PS4 and Xbox.
Exclusives exist to tempt/force you to get a specific console: they do not empirically guarantee a good game and many crap exclusives vs great multi-platform games testify to this.
If insomniac make a good game it won't be because it was exclusive (although code optinization for performance might be better but even that's simply a function of time/money now)but because they designed a grew game which isn't a function of the platform itself.
Being exclusive is either a business decision or because the platform holder literally pays their own developers to make a game for the console (1st party).
The days of drastically different console architectures with exclusives coded uniquely to them are clearly coming to and end. Homogenisation is taking place and the tech is very, very similar with SDKs and APIs etc designed to make a developers life as easy as possible.
In short let's not see business decisions as something they aren't nor inflate the true benefits to consumers they represent particularly when they aren't 1st party.