The industry massively shifting away from exclusivity in the past 10 years answers the first question with a very clear no. There's just so much more money to be made having games be on as many platforms as reasonably possible. At this point only Nintendo can get away with full exclusivity and even then I think it's only a matter of time till a shift happens there as well even if it's still over a decade away.
For the consumer it's also a no since the average person naturally wants to access as much media as possible on whatever device they use. For example it's great for Final Fantasy fans that they won't have to buy Playstation consoles any more to play new FF games right away. There's people out there that got a PS5 for FF16 and Rebirth and haven't touched it since the latter.
In the past unique hardware could lead to unique experiences so exclusives did use to have way more of a point. The DS had games that did really creative things with the dual screen aspect so that's the one major area where consumers and the art form of video games could benefit from exclusivity though nowadays that factor is a lot less prevalent.







