There is a very strange thing happening. Waves of affluent tourism are being sent to what really is a Low Caste art and sport. Many do not realize that Thailand's society is still somewhat an operational, invisible caste system, itself formed from Siam's own, once widespread slavery and indentured servitude. The ironic thing is that some of Muay Thai's most beautiful, meaningful traditions of meaning - the things that lift it from just being a rationalized combat sport, or entertainment violence, and very likely also what made Thailand's nakmuay so incredibly effective as fighters - themselves are woven into and from that invisible caste system. It is quite extraordinary that this lower caste art and sport is becoming gentrified by both hi-so internationism and government tourism ambitions. That the sport itself is being altered so that the affluent can win, and so that traditions (and aspects of invisible caste) will be eroded. I'm not sure anything like this has ever happened before in history, I can't think of an immediate parallel.
When (relatively) affluent adventure tourists attempt to partake directly in "traditional" Muay Thai they are crossing many invisible lines in the culture. A (relatively) high status person is trying to enter a low status position, blind to even the nature of "status".