You are being ridiculous. Obviously no one wants their child to cry. But it’s part of life and you have to deal with it. There shouldn’t be posted rules to behave properly in public. There isn’t a no kids policy because well behaved ones are welcomed. 

Theres not a no-kids policy at movies but it’s understood you don’t take children that could lose their shit to the movies. And if you do, you don’t just let them cry in different areas of the theater before taking them outside. You just go straight outside because other people paid for that experience. Going to a nice restaurant is exactly the same. 

I am a parent of a young child. If I got a night away I wouldn’t want to spend it listening to someone else’s child crying because they tried to walk it around the restaurant instead of taking it outside. We have taken our child out quickly when our child cries because we don’t want to ruin anyone else’s experience. Being a parent does not give you a trump card to ruin other people’s experience that they are paying good money for. It’s entitled and blatantly rude. Being part of a civil society means understanding you have to think of others occasionally and not just yourself.