Also, I'm not sure of newer generations where you're from, but here what I see is less and less want from people to have in-person conversations. Newer generations have everything done remotely. Ordering food, socializing (online video games, etc), that in-person conversations often are intimating to them. Which begs the question, have the people who say juniors need in-person help actually asked juniors what they would like? Or is it more that _you_ are more comfortable _teaching_ in-person, in which case again, the problem seems to be you, not the juniors.
All-in-all, I'm just not seeing the difficulties people seem to say they have. Just my $0.02.
As another example, I've worked with some people who are quite confrontational and dare I say, aggressive, on camera, and have raised their voice a couple of times in the past. This same person has very different interactions in real life, a lot more empathy, where it becomes apparent the other person is in fact, an actual person with emotions.
That said, if a person is unable to conduct themselves professionally whether it is via a video call or not, I think it has nothing to do with remote work and all to do with that particular person being bad to work with.