I think, like most jobs, the working conditions depend on where you work and what kind of school it is. But people often confuse the time their DC spends in school with the hours a teacher does. Programmes like Waterloo Road do nothing to dispel this with shots of the Head wandering in with the DC in the morning. My mum still thinks DH is at home on inset days. 
A friend's DH is an IT teacher and loves it. He leaves school at 5.30 every day and does minimal work at home in the evenings. He's on a good salary.
DH is a science teacher with a TLR, works at a very demanding school where nothing less than outstanding is acceptable, gets no breaks during the day as they are spent setting up the next practical, in meetings about how they're going to get little Johnny to achieve his target grade or phoning parents. He often comes home without having had any lunch, works till 9/10pm in the evenings, mostly marking controlled assessments, and shouts at DC if there is the teeniest bit of conflict.
Another friend is a teacher and she switched to a mooncup on my recommendation as she has heavy periods and some days she doesn't have time to go to the toilet to change her tampon. Don't ask me how, but it's a genuine problem that she has struggled with for months.
My feeling is that over a 12 month period teachers work a similar number of hours as a typical high-pressured hard-working job. Unfortunately for teachers, it's condensed into a shorter period so can become very high-pressured and can be incredibly stressful.
DH took a 50% pay cut to go into teaching, but there'll always be jobs that pay more or less for the same qualifications and/or working conditions. I have police friends who are very
at the salaries firemen earn and say they spend most of their night shift sleeping at the fire station. But then they run into a burning building and risk their lives to save another. So who's to say who has the harder job and should be paid more?
But I do despair when teachers don't help themselves or their profession by thinking they're worse off than everyone else. Some are, some aren't. I expect OP was having a vent and had had a bad day when she wrote that post. Though for every bit as wearing it gets for non-teachers to listen to teachers wringing, it's just as wearing to be told you have an easy job, work 8.30-3 and get 13 weeks' holiday a year and 5 inset days, because that's simply not true either.