Artists considered prog on here but not elsewhere

For the record, the only ones I own and have heard by NIN are downward spiral(which is ok) and Year Zero (which is pretty awful). I'm sure they are good at what they do but based on what I've heard I have to say I don't think NIN are for me. Also, keep in mind I'm not someone who thinks all music I like is prog and vice versa. If I like it then I like it regardless of the genre. I'm willing to give most stuff a fair chance but realistically we aren't going to like everything. Also, not every inventive or even progressive band can be considered prog rock or prog(since there's a difference between being progressive and being prog rock). If they follow the prog formula or structure on later albums then fine but I'm still skeptical about them being considered prog on here especially when collaborators have said that just having a few prog albums doesn't make someone a prog band. There's been debates about whether Muse are prog also and probably a bunch of other bands. Obviously we all have our own opinions and I'm sure there was much back and forth discussion(and arguments) before they decided to include NIN on here(much like with SD) . 

I'm not really against NIN being considered prog(same thing with SR) but my main problem is this. If you have NIN as prog then it starts this whole big snowball thing where then you have to include Phish, Tool, Radiohead, Muse, Coheed and Cambria and on and on.Most of those bands are on here anyway actually. However, my point is you have to draw the line somewhere. IMO, NIN are more like industrial and not prog. However, I'm sure there's a good reason they are on here and not Skinny Puppy or Ministry and so I won't argue about it. It's just that based on what I've heard by them I wouldn't consider them prog. Maybe I need to hear more. Who knows.

Obviously, there will be older prog fans who are more accepting of bands like NIN and Sigur Rós being prog; and younger fans for whom this seems odd - but broadly speaking, and making the kind of generalisations that are bound to get me in trouble, I think the younger generations are able to recognise prog across a far wider spectrum than older fans who, if not stuck in the past, still stick to the more classic, symphonic sounds.

They call Kate Bush progressive pop (among other genres).

https://rateyourmusic.com/artist/kate-bush

Whereas Tori Amos is called, variously, Art Rock, Piano Rock, Alternative Rock, Classical Crossover.

https://rateyourmusic.com/artist/tori_amos

I think this is in line with general perceptions of how her music should be classified.  I don't think Kate Bush fans in general would be surprised to know she has a home on PA but Tori Amos fans would be flummoxed to learn she is prog. I don't know what I am missing and I am a fan myself.