Are you positive or negative on casinos asking for log-in frequently or do you feel unsafe in putting your login details every time?
I'm used to this set up and not a problem if they often ask for my login details everytime I open a browser. In fact, I prefer this one rather than keeping myself logged in on the particular site (even for other users it is convenient) just to save time and hassle. However, it's a different thing if i'm already logged in, then I hit the backspace or check their other features then they will ask for my login details once again even i'm not closing the browser, in this case it's hassle and annoying even it's for security.
It will be a form of security for us if we ever want to gamble, we have to log in to enter our gambling account. It can also prevent hacking, which may have used vulnerabilities in browsers that we don't know about so that hackers can use the loopholes to get into our gambling accounts. With this login facility, we have implemented one of the most basic parts before we log in to our gambling account, so it would be even better if we also activated the 2FA feature or something similar so that our gambling account would be even safer. But whatever it is, every gambler will find which one they like and use it even though it may not be safe for other gamblers. And they already know how to deal with it if something goes wrong, so we'll see it as unsafe when for them, it's perfectly safe.