It managed to run two syndicated series in the '90s. They already knew had they tried to relaunch Star Trek on an actual network back then, It probably would have lasted 13 episodes at most. (And hell the first two seasons of TNG are not good writing at all.)Star Trek at times in the 60's had decent nielson ratings, and it survived very well in reruns. It managed to run two concurrent series throughout the nineties. It had an 18 year uninterrupted run from the 80's to early 0's. I wouldn't call it niche. During that run Mandalorian was obscure EU book stuff. I wouldn't have dreamed people that once snorted "nerd" derisively when faced with anything that looked like space or a robot would be avidly discussing baby yoda, Mandalorians or how Han's blastec blaster is really based off a Broomhandle Mauser. Stuff is well and truly changed. Star Trek can get that kind of audience pick up as well..
(but i will admit, i kind of hope it doesnt)
The current Star Trek series are in a similar situation. They're on a platform completely controlled by the production company that makes the episodes. Paramount is counting on the existing fan base jumping in whole hog for whatever reason (IE - Even if they're complaining, In the end they are watching the show and generating revenue for Paramount in some fashion); and in the end all that counts as far as paramount is concerned is the return on investment (ROI), and as long as that ROI is good, Paramount will continue to produce Star Trek.
One thing you can say about the Star Trek franchise in general that wasn't true for Star Wars is that there is never been more than a four-year period between a major Star Trek TV or film production.
The fan film folks like to declare Star Trek dead whenever there's a lull in official production, but from 1969 to today there's never been more than a 4 year gap with no official Star Trek TV series or film being produced by Paramount / CBS.