It’s her prerogative.
I have a sneaking suspicion that her child was one of the misbehaving children (though she would never admit it).
The parents of well-behaved children in my acquaintance wouldn’t complain about a rule like this; they’d just make a note to have a date night at the restaurant.
“”I can’t believe this. I am offended.”
So am I every time I hear screaming kids and see useless parents letting it happen.
When my kids were little, noisy and PITA’s my hub and I went out to eat one night to what was considered an “adult” restaurant (it had a bar) to GET AWAY from our noisy bratty kids and spend some romantic time alone. Didnt happen...some a$$ brought their somewhat newly- born who cried (screeched) the whole time. We never went back. That restaurant soon closed. We only brought our kids to “kid friendly” places and McD’s is still there!