Gambling on a casino that restricted people from a region absolutely means that your patronage on the platform is not needed and should be taken to somewhere else. One of the reasons why I think casinos have no option than to restrict some people from certain regions is because of very strict local laws.
There are some regions that have very strict laws concerning gambling making it difficult for some casinos to operate and because of that, many big brands have to restrict gamblers from those regions preventing the government from sanctioning them.
It is better to avoid any casino that restrict your region from using their platform for your gambling activities so you don't lose your fund when they finally know that you are from the restricted regions.
I don't think the restriction is right because of course anyone who wants to gamble will find a way to do it. Especially in recent times when technology has increased so much, it is almost impossible to prevent this. For example, this can be removed by using a VPN. Therefore, blocking sites has no practical use.
Do you know that the same way one can use a VPN to bypass a website that restricted you from using their site just because you are from a restricted location, same way the website can equipped their server with geolocation services that could spot VPN users and check for their main location.
Do you know that some casinos allow you use VPN on their platforms knowing fully well that you are from a restricted area but still leave you to use part of their services to gamble with the hope that they could make money from you when you lose several bets.
Sometimes we felt like we have bypassed a casino even when we are using their services from a restricted regions without knowing that this might be a trap that will leave you in depression when you needed help from their customer support.