I quite disagree....
I personally do hair tutorials so first, I have often no choice but showing my face and second when I watch videos, it's a plus if I see the face who talks.
Before owning a channel, I reflected on if I will be able to bear the critics, the insults and trolls.
I took the risk and for the moment, I am satisfied with my community. Plus I have chosed to moderate the comments so when someone post, I have to accept the comment on my channel. I did that so my channel stays a clean and happy place
I understand that it will be hard when I will have mean comments but I got prepared to it before I decided to expose myself ^^