Especially because those younger kids don't even think about it. Getting beat up a bit is the entire point of going to class in Muay Thai. If you're not getting beat up you're not progressing, and if you're not progressing then you should be moving towards doing so.
Everyone has been beaten up by someone younger/smaller/weaker than them in the sport. It's a rite of passage and is a large reason why the sport is filled with humility and discipline. There's always someone better than you, and it's extremely important to keep that in mind especially when working with those who have less experience.
I started when I was 14 and after 6 months of working my ass off to become proficient enough to spar for the first time, a girl half my size made it very apparent I had 0 clue what I was doing. I'm 24 now and I still get regular, similarly grounding reminders. A few weeks ago I trained with someone who made me feel like I was still learning to jab, and I learned more from them in one class than I had in the prior few weeks.
This is entirely a cultural problem if that's what you experience with remote employees.
My company is remote-first with WeWorks for those who want them. Every meeting 90% of people have their cameras on, and the other 10% are either attending to something more important than the meeting or just not feeling it that day. No one questions them or gets onto them because we're not children.
If many people regularly have their cameras off in meetings then maybe your meeting isn't worth their full attention, and they're working on something else. Not every meeting needs everyone to be there. I'd wager part of the reason my company doesn't have this problem is we have an extremely low meeting culture. Impromptu meetings/discussions are encouraged and we often Slack huddle for 5-10 minutes when needed which cuts out a lot of the bullshit.
At my prior job we accounted for 2 hours a day of meetings when planning and it was a fucking drag. Now I have 3 1/2 hours of recurring meetings per week, with a sync for new projects/initiatives every few weeks. I get so much more done every day because I'm not listening to an endless stream of information which should have been an email.