I'm willing to entertain the possibility. And, unlike most things that people try to peddle with low-quality evidence, going to a sauna isn't obviously unhealth

I'm willing to entertain the possibility. And, unlike most things that people try to peddle with low-quality evidence, going to a sauna isn't obviously unhealthy. So, it's low risk. The bigger issue is that observational results often invert cause and effect, and without any clever instrumental perturbation, such studies are merely hypothesis generating.