I am childfree myself but actually think a woman reproductive choices don't suddenly become anybody else's business just because she's older.
Lots of grandparents regularly babysit and sometimes do full time childcare for grandkids, nobody says they are too old when their own career is on the line.
People are living longer, staying healthy for longer and staying fertile for longer. You have no idea of a woman's beliefs on abortion. I actually have a friend who at 50 thought she could bo longer get pregnant. She did. She didn't know she was pregnant at all until she went into labour (she is overweight and it was hidden).
Lots of people will pile on and say dumb stuff like 'id rather have my mum than any amount of money' but the reality is most people need an inheritance to get on the property ladder now. Everybody dies sooner or later. Recieving that inheritance at 30 is potentially more practical than when you're 60.
Lots of people don't have opportunity or find financial stability or a suitable partner until much later in life. They shouldn't be told they can't have a child just because of some made up rule.
Yes there's more risks as people get older but equally there is more risk with genetic predisposition to autism etc. and I know many people who have multiple severely autistic children. Should they have been forced to stop at one? Or people who have a disability themselves, should they be told not to take the risk?
Obviously nobody should be forcing 50 year olds to have children but tbh if they really want to what harm is it doing it anybody else? None.