All the responsibility is put on the woman, yes. She has to “fight for it”, pay a lawyer, etc. etc.
IF and only If she ‘wins’, THEN and only then the man has do so something about it.
Otherwise, he’s free. 100%. Walkaway. Go off to the woods. Start a business. Start another family. 5 families. Whatever he likes. It’s nice men get that freedom but women have to go through red-tape galore to see any legal responsibility from the guy.
But she bears legal responsibility from day one now.
I find that weird.