I agree with you, @DoAClassicCamel
Sad to see people calling their parents selfish, assuming only based on their age of having their children. They are hardly very old ages mentioned!
My dad was 37 when i was born (their 3rd and last child). I lost my dad when I was turning 27 (my 27th birthday was 6 days after his death). He went way too soon, after years-long battle to cancer at the age of 64. I've never felt angry at him for not having me earlier (or perhaps never having me, since I was number 3!). I had a great childhood and upbringing, which is the most important thing, surely.