It speaks to one of the largest failures of technology, which is that the techno utopians from Gen X believed the Internet would herald a new age of informed democracy and rational debate. Instead what we got is a balkanization of ideas where no one has to ever hear anything vaguely uncomfortable and we can all stay ensconced in our little tribes.

If you have a roommate that loves throwing parties, and everyone else is maybe super tired from working, you're gonna have a bad time.

If you have roommates that don't believe in cleaning, ever, then you're gonna have a bad time.

If you have roommates that spend a lot of time torrenting and your internet gets shut off, you're gonna have a bad time.

If you have roommates that are really into drug culture, you could well end up having a bad time (seen this happen once or twice).

You can all be totally different in, say, politics or sexuality or income or whatever (provided rent is still being made), but it gets super shitty super fast if the basic "Hey, this is our home, don't cause problems" stuff isn't nailed down.

Is this because you're worried about an echo-chamber effect where you won't learn, see or do something new? Some of the benefits I get from hanging out (and living) with like-minded people is that they've come across some new music in a genre they thought I might appreciate, read a new study or article in a field of science, politics or philosophy that we commonly find interesting, cook an obscure meal or go out to a new restaurant that, based on my past preferences, they knew I'd enjoy.

Expanding one's experiences and tastes can be an evolutionary process, and people with similar tastes can help you step through them faster than you would on your own - the cadence merely increases. It doesn't have to be a binary thing either - often someone's friend or partner will be quite different philosophically and you have the opportunity to listen to their ideas or tastes and become richer from exploring those things with them.