I sort of agree with you. I’m also 45 and when I was 14, I wouldn’t have dated anyone my age. My friends all had boyfriends that were 5 years older than them and no one batted an eyelid. I went to a Catholic school and someone in the year below me got pregnant in what would now be Y9 or Y10, and neither she nor or family were shunned or looked down on. In fact, my friends parents had her when they were 14, but they later went on to get married and her mum went back to University and became a teacher.
It’s not an excuse, but I do think things were different back then. You only have to look at Bill Wyman and Mandy Smith (?). He would have been vilified hopefully if that had happened today and I would be horrified if my 13 year old came home one day with an 18 year old (again, this isn’t an excuse. Even looking back, I can’t understand why an 18yr old would interested in someone 4 or 5 years younger than them unless it’s to exploit them).