Okay, i know this isn't something i should say. You are right and a link for non steam player should be available.
HOWEVER, you can use online steam workshop downloader if you need to. Like this one : {链接已删除}https://steamworkshopdownloader.io/
It works nicely. While it isn't the perfect solution, it'll allow you to download steam workshop's files without having the game on steam.

I don't see why you shouldn't say it, Steam workshop flips out on people all the time.
On the flipside though, people in turn aren't exactly saints either.
Unless I've been misinformed there's a way to register your non-steam version that should let you grab mods from here.
So those "non-steam players" I keep hearing about are either ignorant of the fact (unless I'm the ignorant one and it's not in fact the case) or, how do I put it, have debts to settle with Tynan.