This is entirely dependent on the individual's preferences, as one person prefers physical and the other prefers online. When the COVID pandemic hits us, we learn that it is also fun to gamble online, even if we don't see any physical people or crowds, which i think we get used to and don't want to go to a physical casino as we can play in our own comfort without getting dressed or whatsoever. It is like our socialization died over the pandemic. But again, it is more enjoyable if you have friends or other people see you gambling. Imagine going to a carnival and being the only one playing. It's boring, right?
The COVID pandemic lasted more than 2 years and various countries have issued policies prohibiting crowds and going to crowded places so that after the pandemic many gamblers started using online casinos and over time they got used to it so they have been comfortable with online casinos until now.
We can also see that online casinos offer lots of interesting things that cannot be found in real or physical casinos, so that more and more people are really loyal to online casinos.
It's really fun to be able to play in a physical casino because there are lots of visitors and other gamblers who can keep us from getting bored while playing, but I think gambling is not just for fun but also to be able to generate some profit, so playing in an online casino is quite an option just right even though it feels a little saturated.