I just did a google search and several govt web sites claim it does help with cancer.
And found sth interesting about Thailand.
Maybe AseanNow can do an article about this place and interview the founder?
The Use of Medical Cannabis on Cancer in Thailand
https://ijshr.com/IJSHR_Vol.6_Issue.4_Oct2021/IJSHR036.pdf
Wat Chom Thong is a temple known for taking care of patients with cancer, using cannabis as a treatment. With Thailand being a Buddhist country, temples become a shelter, both mental and physical, for the people. Mr. Banthoon Niyamapa or Uncle Tu is the driving force behind the establishment of Wat Chom Thong Dependency Center, which is initiated to help incurably ill individuals who require cannabis treatments. The temple is not a legal hospital but it is a secure haven for everyone, regardless of their gender, age, or religion.