Surprisingly enough, there are characters who cannot exist anywhere at all, not truly. They can't go to any of the domains because of things they've done, and what they look like. They're the outcasts amongst outcasts, and they do pop up from time to time. The Mist Camp is where they go and linger because, well, there is no where else for them to be. That shouldn't be a playstyle that is forced to be ended because it cannot function in any civilian area, and yet nevertheless wishes to interact with other characters. Sure, they could lurk in an unknown area, away from everyone and have no interaction - but that is basically soft closing the character in many regards.
Not all of us belong, and sometimes, not all of us belong 'for a time'. Sometimes there needs to be a halfway place, until a niche is filled that this outcasted individual can then fill out themselves. This has happened quite a few times, and it usually results out of interactions of the Mist Camp. The Mist Camp, the melting pot of all people, is what allows for this interaction that otherwise wouldn't be possible, until they can actually find a place that they belong. My main for a long time functioned exactly like this, as there was nowhere that truly fit the character as a place they could remain. Others have been in the same situation for various reasons. Giving people the means to bypass the MC would limit interactions to these already often quite lonely characters, who despite the fact they've ended up in a tricky position, shouldn't be punished further over it. Not least when many of them can provide a rich roleplay experience for others (not me though I'm just terrible, but other folks have provided enormous narrative strength to others).
It for this 'flow on effect' that I'm a bit wary. Mist camp is dangerous, true, but it serves a very interesting function too. Thematically it may lack compared to other locations? I never really felt that personally. But it provides quite a lot to many folks that otherwise wouldn't be possible for them, depriving them of the core enjoyments we all try to have here.