I upvoted and I'm not a bot :)
I think it's a sad truth that people are more attracted to people with a "blank slate". When somebody has children it means there is baggage and they are forever attached to the mother or father of their children long after separation.
I have personally been with a father of 3 and though I loved his children as a part of him it didn't work out between us simply because of his personal issues taken from his previous relationship. I do agree that people should be given a chance. Nobody's slate is truly clean.