Why such discrimination ?
You need to get out of your head that this is in any way about "discrimination".
You seem convinced that some modders think that the Steam crowd is worth more than the non-Steam crowd, which is quite absurd to be frank, and clearly not the case.
Try for example to read the reply above yours to see one very valid reason not to put stuff in the Workshop ASAP.
As you see, it has nothing to do with discrimination. You got the wrong interpretation, and it's becoming overly dramatic in my view.
It's simply about authors keeping control of their work.
It's also about what kind of feedback you're looking for at that particular point in time.
Sharing stuff on this forum, among seasoned rF2 veterans, most of whom know how to properly test/act around unfinished work, is NOT the same as publishing in the Workshop.
Sharing a 0.0x track on some shady torrent site is NOT the same as publishing in the Workshop either.
I'll again draw a parallel to my own music, because I think it's very comparable.
Do I feel like uploading rough WIP recordings unto iTunes?
Nope, that'd be a freaking disaster, because the recordings are not yet in a state fit for iTunes. It'd give people a completely wrong impression, of what the songs are supposed to be, and of what I am actually capable of.
Would I rather upload some of those WIP recording unto a small forum full of like-minded techy musicians, who can give me proper feedback and advice on song structures, mixing and mastering, etc. before I put the songs out for a wider audience?
Of course I would.
So there you go.