In the early days of the pandemic, that made sense. It also makes sense for folks that are not vaccinated. If the point is that people are vaccinated, it does not really make sense.
Personally, I love Chiang Mai, but for health reasons, I cannot be there during burn season. While I understand your frustration, I’d like to be kept informed on when exactly this begins and ends and what to expect. I’d like to plan accordingly. You can scroll right by for any posts you don’t like. I have needed to scroll past plenty about coming to Thailand to take advantage of the women and how dare those women turn it around on the men. You can deal with a few posts about smoke during the burn season.