I think in general large age gaps when it comes to children and adults creep me out,especially if the adult is a parental figure and they end up dating them.I mean watching a kid grow up and later gaining interest in them is in my view creepy.
For example if a 45 year old dates a 30 year old that's fine imo,they are both adults their brain has developed,all good
But if a 25 year old knows a 10 year old,watches them grow up and then decides to date them when they are of age,i don't feel comfortable