Why do some consider the Snyder Cut a mistake?

I've seen an opinion becoming increasingly common amongst DC fans recently that Zack Snyder's Justice League should have never been released, because it made people get more attached to that version of the characters. Isn't that a good thing? And isn't the director finally getting to show their vision after being forced off during a family tragedy and and actors who had vital performances cut being able to show their actual work and characters outweigh the negatives of a few fans enjoying the film?