Obviously, private businesses may make their own decision about the matter, which is their right, but if a customer does not wish to wear a mask (like me), then they have the choice of going elsewhere.
Here in BKK in the large malls I've been to, there are no restrictions or requirements, and nobody has asked me to wear a mask. Of course, nearly all Thais are still using them, but that is their choice. I have no complaints, and I do not find it "confusing" at all.