RFC: Who is darktable for / What is the "mission statement"

I'm sure we're all more than familiar with the "darktable isn't like X, therefore it sucks" and similar complaints. Recently I became aware of Arch Linux's idea of user centrality, which got me thinking of having something similar for darktable that can be featured on the website in some way. Then I got into arguments with some detractors in the comments of a YouTube video about RapidRAW ("this is the kind of UI darktable should have" etc) and today there was a big discussion on Reddit, all of which prompted me to do this RFC.

Considering that darktable is becoming better known, with more people jumping in blind and/or with the wrong expectations, I suspect that we will only get more of this kind of nonsense, so trying to get in front of at least some of it would be a good idea for everyone's sanity.

So if we can come to some kind of consensus on DT's target user and what the "mission statement" is, I will rewrite the introduction on the front page to make visitors aware of what they are in for and also add a more in-depth FAQ entry along the lines of what Arch Linux has. Longer term I have plans to rewrite the about page, which would also be a good place to have this kind of information.