I disagree. If that is the reason, then why were the rules for virtually everything else besides the bars relaxed? That doesn't make sense to me.
Also, Thailand clearly has no intention of letting in foreign tourists from countries still seriously plagued by the virus. They won't be coming in to Thailand until the crisis is solved and Thailand doesn't think they will be letting in planeloads of potential virus carriers.
They are even seriously discussing extending the emergency decree by another month. The predictions on the news media are all saying that is exactly what Thailand will probably do.
Some seem to think money is going to take precedence over health risk. From where I sit, I don't think that will happen. While so many are out of work and now destitute, Thailand shows no indication that trying to solve the plight of those people will be done by letting in droves of tourists. It seems to me it all boils down to two choices - money first or health first. So far Thailand's choice seems to be health first.