Or because the experience is just noticeably improved...
I could play tennis with a 30$ racket from ALDI but it would be a lot less fun.
I bet you use a high resolution monitor for work? You could argue that is blowing money on something for even a slight advantage, since you could do the same work on a 15" 1024x768 monitor too. Oh, but the experience sucks? Yeah exactly - that's why people want to improve their gaming experience even if those people are casual/only playing as a recreational hobby.
I could play tennis with a 30$ racket from ALDI but it would be a lot less fun.
I bet you use a high resolution monitor for work? You could argue that is blowing money on something for even a slight advantage, since you could do the same work on a 15" 1024x768 monitor too. Oh, but the experience sucks? Yeah exactly - that's why people want to improve their gaming experience even if those people are casual/only playing as a recreational hobby.