wrong, you only don't pay tax here if your country already taxed you, if not, you will pay tax here, regardless from which country you from...direct information from the Thai tax office
DearTod, can I say something about health insurance. I applied for a Non-O visa in Canberra, Australia, and was required to provide health insurance for 12 month. This was in Dezember 2022, also cover for Covid, just saying what my requirements were then