She's a singer back home but doesn't say she wants to work as a singer in Thailand?
I'm not sure about Soul music Pam but there are plenty of RnB/Hip Hop bars/clubs in Bangkok, Pattaya, Phuket etc. The crowd are usually pretty young though unless it's a tourist club.
Adjustments maybe but it cannot be scrapped unless they have other affordable options to allure non-retired people to Thailand longer-term. Currently there are none unless you get a non-legit "visa".
I don't know but so many are abusing the visa on that category it's crazy. Suddenly everyone's teeth need attention from a Thai dentist haha. I can't see it being sustainable.
Because there are plenty of other options for a dentist appointment. You can even stay for 3 months as a tourist which is more than enough time to get any dental procedure done.
No disrespect to you, but I really hope they stop approving DTVs for all dentist appointment applications. It's just madness to expect a 5 year visa based on that.