Real casinos are not the place to go if you are after profit. You can have much favorable environment on online casinos where you can gamble at your own pace. Real world casinos are for fun with friends and partners.
Physical casinos are also a place for business, most of the time, big businessmen visit casinos to enjoy and have fun while interacting mostly with others that is in the same financial status as they are, so they are building relationships and connections to expand their business while having fun.
While online casinos are for those people who really want to test their luck and have fun.
But right now with our current condition, most of the physical casino gamblers are also taking advantage of online casinos because they still miss the feeling of winning and testing their luck.