No one has children to provide future tax payers, they have children because they can and want to. It's for them, not anyone else
I suppose so, but the resulting human being is usually pretty invested too.
I understand the presentation of this particular argument is galling and insensitive but I don’t like the framing that child free people are doing the parents a favour. They’re not, it’s the resulting child, that will grow into a adult and peer, that should benefit from tax spending.
Children are only children for a relatively short time, if you want a generation that you will interact with to be educated and relatively stable then taxes are required for the good of society.