The people who claim that being hit as a child did them no harm are always using it as justification for hitting their own, in my experience. I've always thought that was ironic!
I agree that when we were young always seems like the best time, but that's because we were full of hope and hormones, and had none of the responsibility associated with adulthood.
I am also on a local history site, and without fail, whenever there is a photo of children playing on a bombsite in the smog there will be comments about how 'those were the days', and saying that today's children either have it far too easy, or that the poster is sorry for them because they can't play outside. On the whole, they were playing in the streets because of large families and overcrowding, not because of the 'fresh air' - the buildings were all black with soot.
They forget the cold, damp housing, the childhood diseases that killed people, the poverty, the limited lives of people who had nothing and had to live by strict social norms, because what they remember is the music they danced to, the boys/girls they kissed and the hope they had for the future.