Because Star Trek isn't a sitcom. And the people trying to make it one have, in my opinion, misguided motivations, as you correctly point out.
Yes--its one thing for what's supposed to be a serious concept to have occasionally humorous moments or an episode or two, but the drive to turn it into a sitcom seems like the work of those who feel the need to parody everything, and lack the ability to write a straight dramatic series. No franchise is supported and/or grows with more inferior / misguided product generated.
The flag ship is Strange New Worlds. A show that’s very much the Star Trek brand of space opera and the best version since TOS. So we’re good.
SNW is merely a prequel/spinoff, not the flagship of the franchise.