I fully understand, where you are coming from. … And normally, to make people think, would be the right way.
However, from what I observe, it’s interestingly the better educated and richer Thais, who are still sticking to the old Covid narratives.
That guy at the front door is most likely a low salary employee, just “following the orders” of his managers.
Had recently a similar experience in a famous venue in Chiangmai, where they even requested an ATK …. 55555
IMO it didn’t make any sense to discuss with the bouncers, but stated loud and clear, what I thought and spending my money elsewhere.
However: I made also sure to let the story known to others, who are connected with the owner and that our group spent that night ~10,000 somewhere else.