It’s because the cops can show up and demand ID from everyone inside, they have to make sure everyone has one.
In this case, they have no obligation to ensure everyone has ID on their person.
Can you sue a bar you used fake ID to get into?
My real question wasn’t if there are kids on the system or not, but why are they allowed to sue when they themselves and nobody else have lied about the age verification question?
Yes, kids can and have sued because they got served alcohol while underage - even if they asked for it. The whole premise is as minor they couldn’t understand the consequences, and weren’t fully responsible for their actions.
And establishments get shut down all the time for it.
Your link from an ID verification company says “it depends” wrt fake id liability. I suppose there are sane places and crazy places in the world, for a limited time at least
Is this a real question?
If someone showed up at a bar, would a bouncer accept that?