you keep asking about corner cares. Why are you being so adversarial? The post has nothing to do with Thai background or health checks. I don't set requirements for oa visas, so suggest you direct your questions to the Thai embassy in whatever country you're applying from.
Some people also have long ago criminal history (some as simple as possession of marijuana, others more offensive). People like to leave their last behind and not have to defend it when it's no longer relevant...