It depends on the abortion in question.
In some cases, those who are aborted may well have gone on to become criminals, but some would have gone on to become upstanding individuals, police officers, etc. It's impossible to say for sure, obviously.
Unwanted children are certainly more likely to go on to become criminals. That much is true. However, if the child had gone on to be adopted instead, that changes the equation.
Adopted children still do worse than those with their biological parents. That's on average of course, and doesn't mean that adoption is bad in certain cases.