It will stay here for sure because of greed from human nature won't let them to choose the real way of earning so either they will play online when everything is under lockdown so most of the gambling forms will survive.
But the physical casinos might b facing issues now and this might tell them why they should move to internet culture.
Greed is the reason why people loss big out of gambling. Now the situation has gone worse with people facing economic issues. When there is need for money people always intend to risk to earn big out of the narrow way. Another thing being lonely, now with the lockdown some spend time with family while there are people who are lonely spend on internet related activities.
Gambling falls under this category, and if luck gets them an earning out it will be happy. If things go out of the prediction it will surely cause frustration as people are suffering much.
But most of the people are under lockdown may not have enough money to gamble so they might be more cautious than their real life scenario in pandemic but still more people will get attracted to gambling as you said since they were lonely now and looking for some kind of fun out there.