You're correct, a buffer between the team and the public can be a good thing for mental health. However, that can also be detrimental in that it can keep you from constructive criticism, lead to conflicts of interest, etc. It's never really cut and dry. Plus, personally, part of the indie life style I like is the ability to micromanage every bit of the operation. Not to mention that it'll likely be unrealistic for many indie operations to hire a dedicated PR guy in general.
Once you grow big enough, I think it becomes inevitable that you'll need a PR face, but at the level I'm talking about, self-control should be enough.
take this very post for example, lol - I just deleted like 2/3 of my post because I realized I was commenting too much on my personal views on phil fish, and when you discuss a polarizing figure like this, you will always, without fail, upset someone. So not saying anything at all is the smarter option.