Not necessarily so, a few yrs back I went to a Thai hospital with a suspect cancer spot the Dr immediately scraped the spot and sent for a biopsy, quick result negative.
This year in the UK I went to our local GP with a suspect growth, Dr said he wasn’t trained to take a sample and instead photographed the spot and sent it to the local hospital, two weeks later instructed to go to the local hospital in another two weeks where the dermatologist inspected and proclaimed it to be a Basel cell carcinoma, again she could not treat it so I have now been waiting 7 weeks for for an appointment to take out the spot.
This shows that in many instances your options for first class medical treatment is in Thailand and not the UK.