Context: have been doing remote software work for 13-18 years (depending on whether you want to count part-time work). Had kids in fully remote school spring 2020, hybrid for most of 2020-2021 school year, fully back to school since spring 2021.
Remote work as a junior is _very_ hard, for most people. Even worse as an intern.
Remotely mentoring a junior is likewise pretty hard: you have to build in more structure than you would if you're sitting next to each other, and it requires more remote-awareness discipline on the part of the junior, which they may not have yet. Remotely mentoring an intern is pretty impossible in most cases. Taking on interns is something I have not really done, because it would not be fair to them...
For learning, remote learning in kindergarten with the tools we had last year is an absolute shit-show (starting with the fact that the kids can't read yet, so even communicating what they should be doing to them can be quite difficult). Not even the most self-motivated kids can make a lot of progress in that environment. And the kindergarten teachers I talked to completely hated it. They had to invest a lot more time than usual, for worse outcomes than usual. Of course these were teachers who cared about doing their job. :)
Remote learning in late middle to high school (think 13+) still has obvious challenges (science labs? access to equipment? a quiet space for the student to work at home?), but it's a lot closer to viable than kindergarten. The most self-motivated kids can do OK. Everyone else does somewhat worse than they do in-person, not least because they are sitting there at a device with endless temptation even more at their fingertips than in class in terms of social media and whatnot. Doing all the homework electronically can be a PITA compared to writing on paper (e.g. for geometry), but that may not be an inherent feature of remote learning.
In between, it's a gradient from the complete insanity of K to the sorta-maybe-viable-if-we-have-to of high school. Basically, remote stuff requires a lot more maturity and self-discipline, both for school and work...
I love working remote for various reasons, but there are plenty of times I wish I could just hop into the same room as some of my co-workers and sort things out on a big shared blackboard; the tech for this is just not there yet in practice. I would never claim that remote work is always best, or for everyone.
So maybe it's just selection bias, in terms of what you see on HN? Takes a lot longer to type something like the above than "remote work is the best"...