Nehrim, Wyrmstooth, Falskaar, Tamriel Rebuilt, etc. will never not be The Elder Scrolls. It can't not be those. This is where mods might lack the depth and freedom of new IPs, programs, or projects. This is how it is different from Cave Story. The creators of these mods are not Bethesda and so don't have the same liberty for creating content that Bethesda does, which is also where it would differ from Cave Story.
Why am I assuming all modders want to monetize? Please point out where I'm assuming this and I can explain why, because I'm not sure where or how I'm doing that.
I'd like to have a full conversation and clear up miscommunication, but I can't do that if I'm made to argue with a twisted phantasm of my own opinion.
So the basis for whether something has depth is whether or not they have their own IP and game engine? So Star Wars games don't have depth because they don't have an original IP? Games based on the Unreal or Unity or RPGMaker engines don't have depth because they're based on prior programming? What about regular DLC like Dragonborn, does that have any depth? Nehirim wasn't even based on Elder Scrolls IP and had new mechanics like a crafting system. Bethesda has nothing to do with anyone's ability to create content (someone was working on a Fallout TC for Morrowind well before Beth bought that IP, creating their own assets the whole way through).
You said "You're gonna buy the game and then see every modder-turned-street peddler ply and plead for your attention and coin." So you didn't say every modder would monetize, but you certainly make it sound like the ones that do will be unavoidable. For that matter, there are a ton of indie game devs on Steam looking for attention and cash, and they haven't ruined indie gaming so I'm not even sure what you're concerned about. If you're not interested in paid mods, just avoid Workshop and stay on places that only allow free mods without advertising.
The most likely answer, is that Bethesda will send the attack trained lawyers on them.
They sent the lawyers after the creator of minecraft for DARING to call a new game project he was working on "Scrolls" not that long ago, claiming the name was a trademark violation against the Elder Scrolls franchise, even though the games had NOTHING in common.
If Bethesda/Zenimax THINKS they could maybe, possibly, be losing money because of lack of enforcement of their IP rights, they *WILL* send the lawyers.
Standard lawyer practice. Not just Bethesda does it. The way the law works, if you don't set precedent for defending your IP, then you're unlikely to win any case where someone clearly steals your IP. They could've allowed Scrolls to continue existing as Scrolls, but then someone else could make another game also called Scrolls that clearly intrudes upon Beth's IP and get away with it on the argument that Beth is no longer defending their IP. It's why you rarely see games with simple names and no subtitles any more. Try making a for-profit game called "Effect" or "Theft" and it won't be long before EA's or Rockstar's lawyers are on your case. You don't have to like it, but IP law is complicated and screwy, so hypervigilance is the norm.
Funny thing is, I've yet to see a single modder speaking out in favor of this except as a way to stop their work being stolen or because they didn't know what it would entail.
Putnam, this is what I've been responding to the entire time. People are moving their work to Workshop for the purpose of monetizing it. If that's not being in favor of the idea, then what is it?
And this is the point you've been ignoring. There is a grand total of one mod in the paid workshop that is 1) quality, 2) not stolen, 3) not a joke. Everything else is rubbish that was clearly made in an afternoon to try to cash in.
I'm not ignoring that the paid mods are by-and-large crap, that's
not the point. Each and everyone of those modders put their work on Workshop either thinking that paid modding is a good idea, or that paid modding is a bad idea. I find it extremely unlikely that people would put up non-stolen, non-joke paid mods, regardless of quality, while simultaneously thinking it's a bad idea.
Edit: Something that needs to be clarified: Most of the initial paid mods were made very quickly because the modders involved were given short notice and were asked to make new material. isoku, xilverbulet, and Chesko were the only ones who elected to put up upgraded versions of preexisting material (and Chesko has since pulled out, while isoku has a DMCA take down to contend with). That doesn't make any of it quality work, but please understand that they were working under ValveThesda's wishes and deadlines.