I don't disagree, but Spider-Man is to the MCU was Batman is to the DCU. They'll make TV shows in his universe but never actually with him because his films are cash cows.
Hmm, I'm not so sure. DC/WB has this weird policy where they never want two competing live-action versions of a character at the same time, but that's because most of their shows have been in distinct continuities from the films and they thought having two competing versions would undercut each other financially or confuse audiences or something. They don't object to doing TV series based on major characters like Superman or Flash, but they'll only do them if there isn't a competing movie version in the works. (They did plan to release a Flash movie while the TV series was on, but that was only because the TV series had come first and was a big hit. And as it worked out, they didn't release the movie until the series ended.) It's just that there are always Batman movies in the works, so the best a TV series can do is to use Batman-adjacent characters or to feature Bruce Wayne in a non-Batman role.
But I don't think Marvel has the same policy, particularly because nearly all its live-action shows and films are in the same universe, so it would be seen as synergy, not competition. Even before Disney+, a number of MCU film characters showed up in
Agents of SHIELD (Coulson obviously, but a few others including Nick Fury, Jasper Sitwell, Lady Sif, and President Ellis). And now they do TV series built around movie characters like Vision, Scarlet Witch, Falcon, Winter Soldier, Hawkeye, etc. Heck, they've even taken characters who started out in their own peripheral TV world, like Kingpin and Daredevil, and brought them fully into the MCU.
I'm not saying I expect them to do a Spidey series, but if they don't, it would probably be because Holland is too expensive, or because of something to do with the Sony/Marvel split of control over the character. It wouldn't be for the same reason DC doesn't do Batman, because they're not the same studio and they have their own distinct approaches and reasons for doing things.