Did you have both of your DC in your teens? Do you consider them both a big mistake?
If someone under 16 became pregnant, I would be concerned about he health. If someone under 18 was pregnant, I would be concerned about her education.
But then if a career minded person in their 20's who was desperately trying to climb the career ladder became pregnant, I might be concerned about her career.....but I don't really think anything about people of any age in general. Everybody's circumstances are different.
My mum was barely out of her teens and she has a very successful career. I was also young and still went back to finish my master's degree. However, I think I would be quite sad if my daughter was a really young mum. It is hard to build a career or finish your studies when you also have the demands of a young family. I also wouldn't have wanted to miss out on all the crazy fun and travel that I did in my teens and wouldn't want my children to either.
It is certainly not a choice I'd advocate but I really didn't want an abortion and was upduffed by accident, so just had to deal with it.
I'm now doing a degree and it would obviously have been easier the other way around. People will think/say what they want, so it's how you feel about yourself and how you act that matters. Who cares, frankly?