But illegal, should it really be like this?
If these guys are as good as described, then doing that nostrification should not be that hard.
The process is the same as in the USA or Europe. If someone wants to move to another country and work there, he has to go through that process to get the necessary certificate to work there legally.
It should be respected; otherwise, there are all medical professions working in Thailand without any recognition of their profession, like nurse, dentist, therapist, pharmacist, etc.
In the medical field, it should be even more important.
Anyway, I found that post that also described this process.
https://www.thailand.go.th/issue-focus-detail/007_035