might be relevant: https://thailandsnakes.com/all-thailand-snakes-by-species-and-common-name/
“With over 200 species in the country, there are many snakes that look VERY similar to each other. A noted biologist, Dr. Joseph Slowinski, died when bitten on the finger by a very small krait years ago while helping in Burma. His assistant misidentified the snake and Dr. Slowinski reached into it only to find the krait attached to his finger. He died about 35 hours later.”
maybe they’re not as stupid as you think. just risk averse!