Originally I was just going to call you a bunch of peasants complaining that a Porsche hasn't got as much room for shopping bags as their Toyota Corolla... but, let's be a bit more constructive and put this keyboard in a perspective that you may relate to more:.
Most of the comments sound like somebody complaining that a) "I'm not paying extra 600$ for a video card, my CPU has one built in, what a rip off!!!" b) "No VGA plug, no sale!" c) "A full sized video card in 2017? I don't know, most designs are AIO or laptops!"
This is a keyboard that competes with the likes of:
https://www.modelfkeyboards.com/
https://shop.norbauer.com/ - just an aluminum body, sold out in couple days for ~300$
https://is.gd/IICYdY - these are the kind of prices you can expect to pay for a decent bespoke board, the K-type is trying to offer those kind of features for much less. Prices are high because runs are small and usually oversubscribed.
http://www.gonskeyboardworks.com/ -bespoke south korean boards
This is before most buyers put on a decent set of keycaps that will run you ~200$
So... the K is a really good deal, for people into decent keyboard, it's like a Ryzen 1800X for 1600 price. It's not the top tier of keyboards, but it's decent. Personally, I wouldn't touch anything with a cherry switch in it, capacitive buckling springs or Topre are my kinks; but for cherry fans - it's a great deal - put some Gatistotles or Zealios in it and it's pretty darn good; amazing for the price.
If you want to start a deep dive into the world of bespoke boards (and using a car metaphor...)
https://geekhack.org/index.php (- the pimped out WRX and German luxury car crowd)
https://deskthority.net/ (- MkII, E-type Jags and 70s Mercedes SL crowd. Keyboards with backlights are for chavs and if you need to see it in the dark you need to learn to touch type better.)
https://www.reddit.com/r/MechanicalKeyboards/ (- posters of exotic cars on the wall, doing up mum's old PT Cruiser in the gge. Good place to start; dad's with nice cars to hold your hand)
https://www.reddit.com/r/mechmarket/ (-autotrader people kicking tyres and trading pink slips)
TL
R, if you are happy with your crusty, mass produced, cherry brown board - all good, but complaining about the cost is same as complaining about top grade CPUs and GPUs; the top end is always pricey, and if you don't know why - you probably don't need it - YET...