You're putting the cart before the horse in various ways. Saying "it's a virtue to change your mind" implies you're already at the correct solution, and everyone who disagrees with you is wrong.

They may find out in a month or in a year that the opinion they hold today was wrong and change their mind again. The statement would still be true.

I'm not judging the statement on its own, but within the context of their post, it's clear that it reflects their assessment of their own position on LLMs vs everyone else.

It is a virtue to change your mind, but using it in that context reveals something else.