As you said, if the casino is such that restrict our country, we should not play smart but abide by it. After all, such a casino is not the only caisno in the universe.
Unfortunately when gambling is illegal in your country, most of the top casinos would also comply and will not cater your country. maybe there are some out there that will cater, but you have a pause for a while and question their reputation as there are only few license provider in the industry and most of them have a similar rules. That's why some people are using VPN to gamble, but it's cheating, so they have to be aware of the consequences but if they accept the risk and possible consequences, then that's really up to them, what they just like is to enjoy in any available ways.
I dont think casino works that way. Gambling is illegal in my country but so many online casinos accepting players from my country.
As far as I can see, most casinos are following the regulation by the license and their own terms so even if gambling is illegal in a country but the country is not on the restriction list by the license and the terms of the casino then it will be fine.
Using VPN to bypass country restriction is cheating ofc but using VPN because gambling is not cheating for the casino but it is cheating for the country's regulation/law.
Yeah some casino allows VPN users as I have seen this case couple of times even if they are not allowing the use of VPN but this is case to case basis , if we will contact the support they will allow us to be excluded for that rules as the country restriction .
so I agree on you that in some cases this is not cheating but a special offer from casinos. but make sure to record and have proof of that allowing because they can just deny that once you win huge amount so be ready for sideways of the situation.