You overestimate Thailand a bit too much...Vietnam is the most very narrow minded asian country. Stark difference in mentality compared to say, Thailand
Government and Business Group in TH seem to understand about geopolitical and importance of stay in middle between US and CN. Many Thai peoples however are pretty pro US, some of them are already entertained the idea of put tariff on China goods and distance Thailand from China in order to appease US.
Beside, Thailand already came so close to be another Philippines when the Pro US party almost won the election.