FruitCider
I have done many jobs, some harder than others, some more exhausting than others.
I wouldn't compare them to each other, because IMHO opinion that would be stupid.
I also wouldn't say that 'x' job is a easy because I heard something on the radio or read it in the daily mail.
I couldn't for instance tell you how hard a nurse works or what its like in a call centre.
I can tell you from experience that nigh shifts are nasty to get over and that that the public are a bunch of arseholes to deal with because I have had experience of both.
Teaching is hard, but I (and others) have never said that its the hardest job in the world because that would be stupid.
As for the OP part of being a friend is listening to them moan, whether its about jobs, relationships, children, cars or the next door neighbour. If you can't do that, then get different friends.