Hmm - wouldn't agree with this, I work in a professional field and the standard is OK but reasonably below Europe.
That shouldn't really be too surprising. Reasons ? A fairly weak educational system and wider systemic issues.
I've had some shockers with both dentists and doctors here in Thailand.
Thankfully nothing that has cost my health (yet) but certainly some money and time.
At face value, parts of Thailand, especially Bangkok, are actually reasonably well developed in terms of infrastructure and technology but if you scratch beneath the surface....
Not meant to be negative but factual, Thailand is what it is - a developing country with all the pros and cons that entails.