Not all I guess because 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 and 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.. 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 don't quite agree here. For most gamblers, even offline casino gamblers, it will be easier to find any option to gamble than start fighting the addiction when it is not nessesary to even fight it. There is not any difficulty to play online casino, really. During lockdown they have a lot of time for learning how to use search engines, how to find trusted online casinos, how to deposit. Quite the opposite, this is a good time to "evolve" addiction further by opening new horizons of gambling. But this is simultaneously a good time to start using bitcoin as one of the basic currency of online gambling, spreading adoption of real money, not paper one.