I can certainly understand a new or student teacher being a bit intimidated, as teenage boys can get a bit boisterous, but shouldn't be a problem for anyone with experience.
True but from the number reported they can't have all been trainees. Some of them are just soft emotional needy types (often found teaching drama, music etc.). One particularly stupid example was being told at a staff meeting that an experienced teacher of 8+ years was 'afraid' to be in a room by themselves speaking to parents via Zoom.
I think it's also a factor that more and more trainees seem to come from private schools or grammar schools. All well and good but they seem to expect students to behave without negative consequences for cocking about. They then wonder why teenagers, having seen no consequences for being a dick, continue to push boundaries until they do get a response.
Same issue in both cases, it's soft cnuts afraid to challenge teenage gobshites over small issues that leads gobshites to think they run the place. If those teachers were just willing to walk in like they owned the place and bollock anyone messing about it would be easier for everyone.
As I grow older I get more grateful for being sent to the local comprehensive in the middle of a council estate as I at least learnt some lessons in reality, getting on with ********* and recognising the difference between when I might get my head kicked in compared to some high spirits and shouting.
Edit - the teachers are all willing to give it Billy Big Bollocks in staff meetings, not quite so willing to wade into a scrap and drag 6 foot teenagers off each other. Something that stood out last time a member of staff ended up rolling about on the floor with miscreants, I intervened and was told "not all staff would have done that". Cowards.