The difference there was that said certain fan film producer crossed several red lines despite repeated warnings and even his associates telling him what he was doing was wrong... Let's not paint that as anything other than one man's hubris ruining things for everyone.
As someone who lived off of doing Trek art commissions for 5 years and is now working in an official capacity because of said fan art, I'm not as worried about a crackdown (AI worries me a hell of a lot more). I've spoken about this at length with multiple artists who either have monetized YT channels, Patreons, or other revenue streams like that, and at the end of the day what's important is addressing and understanding that you don't own the IP and that you're beholden to the owners.
You're essentially playing in someone else's backyard, and it's thanks to them that you're even allowed there, so if they make any request you shut up and do as you're told. The problem is when people (ahem, Peters) suddenly want to claim they're the owners of the house and it's their backyard after all, with 0 ground to stand on.
And there's something else. An aspect of IP law that is often forgotten is that license holders have the legal right to demand the IP owner cracks down on fan made projects if they deem them to affect their commercial performance. So if, for example, a painter paid to have the official license and is making Star Trek themed paintings, but another artist is doing them as fan art and selling them at conventions, then the painter with the license can legally demand Paramount issues a C&D on the fan artist, and Paramount would have their hands forced on the matter. What I'm trying to get at with this point is that often times the IP owner themselves don't give a crap about fan art, but a license holder forces them to act. I know from conversations with people involved that this exact scenario has happened multiple times regarding the Trek IP. Even in cases where the fan art in question is completely free, the monetary gain of the artist doesn't impact the licensee's ability to demand action is taken against them.