I used to love console gaming when I was young but ever since trying out PC's, I never looked back.
PC hardware are getting more and more expensive for us. 10 years back the highest end graphics card would only be 1K+ but these days it can go around 3K+ (980 Ti). Not to mention other parts like CPU, motherboard, etc.
A decent setup that allows you to enjoy proper gaming would cost you +/- 3K range. You can easily calculate (i5, 8GB RAM, board, mid end graphics card) and this does not include other components like SSD, LCD, keyboard.
My believe is that everyone deserves to enjoy life and this means enjoying their PC experiences as well. If someone doesn't bother much about technology, has little demands of what PC gaming means, turn down settings to medium or low just to play the game (even at 1080p - seriously in 2015?), use a HDD and make coffee while waiting for games to load, use a RM20 mouse/keyboard then yes, buy everything used and settle with 1080p like what you said. Buying used might be an option but old hardware could potentially cause problems more than fun and for someone that doesn't know how to deal with it, that's extra head ache.
I wouldn't even want to get close telling people to game at 1080p with "few setting turned down" because I myself could not accept it. To me, that's not PC gaming and might as well go buy a console. I'm not even talking about a high end build, a decent graphics card alone is RM700-900 like you mention and that itself is not expensive?

Ok, I think that's subjective

I couldnt agree more . Playing at low /medium or 1080p is a big nono . Once you have taste ultra setting at 1440p or 4k there is no going back . I rather read a book than play games at low 1080p settings but thats just me.