Even if you have bad mental health consequences interacting with ppl (in all or just select ways, eg groups above 3), you also get bad mental health consequences without socialising (that works over longer periods and can be bad), it's just how our bodies function. So if longevity is something of interest, then socializing is a must afaik.
Regarding all forms of communication - they are all limited at all times, only you have the context & pov of you. And still speech is one of humanity's greatest achievements simply bcs it's so much better at quick or detailed conveying of shitposts.
Performing and masking is just part of the interaction bcs regardless of socializing need we are very individual creatures (tho that could be part of society/culture), ie I might be motivated into you liking me so I filter, preform, mimic, etc what I think will get me that result - not as a manipulation necessarily, but as a limitation of how individuals can interact with each other.