Perhaps menial is too strong a word, fact is though they’re (professional drivers) doing something for a living that most of us do everyday, it’s not extraordinary and the barrier for entry into the profession isn’t exactly set very high. Yes the size of the machine is much bigger and I’m sure that makes it a much harder task.
I’d be gutted if I lost my job, there’s many years of hard work gone into getting it so I certainly wouldn’t chance losing it by behaving like a dangerous, irresponsible arsehole.
So to me, the behaviour I witnessed the other day is just incomprehensible, you really do have to be thick as pig shit to not only treat a vulnerable road user in such a way, but do it whilst actually at work.