It's the developers and publishers that set the expectations. The fans will get mad if they don't meet those promises or vise versa. Look at No Man's Sky for instance. They over promised and under delivered, but fans came back after the devs put in the work to bring it up to par with what they themselves promised. Sorry, but these devs in the article read like they're jealous or afraid their overlords will ask them to make a BG3 without the proper resources.