janeainsworth, there was no alternative in those days - that was what the job was and if you wanted to become fully qualified, that was what you had to do. As for "calling out the tyranny of the system", can you suggest what copious free time there could have been to do that? Not to mention the difficulty, in some areas and some departments, of getting your next job?
One benefit was, of course, that you did get paid fairly well. In my day, we started to get actual overtime payments over - I think , but may be wrong, 60 hours - at a third of normal rate! That is one third of time, not time and a third. You had no time to spend it, so got some savings tucked away by the end of your junior house jobs.
I was lucky, as my house jobs involved less than the 130+ hours per week that Kali2 mentions, as I chose them for the hours rather than for the departments. I knew I couldn't cope with more than about 100-110 hours per week and wasn't ambitious.
As for the idea of saying "we did it so the younger ones can do it too", that is offensive, as nobody sane would wish that on anyone else. Mind you, we did have some older consultants who said that in their day they had to be available for longer hours AND do fire-watching on the hospital roof. There was no point in saying that a) they had a lot fewer treatments available than we did, b) people did not tend to sue them if they were knackered and made a mistake and c) there didn't happen to be a lot of incendiary bombs falling on hospital roofs during the 1970s.