It seems to me that in physical casinos it is absolutely impossible to get into the casino using someone else's documents, because the people at the entrance are not fools and they understand perfectly well who is in the photo and who is in front of them.
Maybe you can't use the other user documents, but you could use someone else bank account. In my country when you go to the casino they ask for a bank card, if you make a profit the money goes to that bank account, so, you could get a bank card from another person and use that to gamble, And it's similar to the online casinos, if you win big then they could ask for more documents but if you win small amounts there will not be any problem.
With such rules, maybe the casino still hasn't gotten any restricted or banned gamblers. Because I am sure, when the casino has gotten restricted and banned gamblers, then the casino will apply stricter rules. Although they ask or require visitors to provide bank accounts, but if the rules are stricter then they will also still ask for other identification to match or ensure that the names listed on the identity and bank accounts are the same which of course their faces will also be displayed on the identity card. Because it seems, to apply such rules is easier to implement in offline casinos, while for online casinos of course there are many ways for gamblers to stay in despite the restrictions.