some just only focus in one game, and if they have been gambling in physical casinos all their life, they might not be able to enjoy online gambling casino
So far, I never read a theory if a person can only focus on 1 game. Everybody is possible to play another game and focus on multi-games. So, a gambler surely has a chance to enjoy online gambling besides physical gambling.
not everyone are really educated on how to use an online gambling casino, some would not trust it and some are not open to learn online gambling.
If you said some, it means some other are possible to learn online gamblings. However, I didn't find out research stated: "physical gamblers dislike online gambling". I'm pretty sure that now is the right time for those physical gamblers try to learn online gambling.
For me, if a person is already addicted, I think this situation would help him if he can't find an option to gamble.
I doubt they don't have an option to gamble. There are many things to be an alternative as a gambling game in this situation. Moreover, online gambling is absolutely a true option for addicts to stay in their habits.