While "gaming keyboards" aren't very important or necessary to have, I believe all gamers on the PC need a decent mouse that is made for gaming purposes. After using my gaming mouse for months, I went back to my standard HP mouse just to see the difference, and the HP felt like absolute crap.
Gaming keyboards might be a fad, but gaming mice certainly aren't.
As for having to apply a lot of pressure, maybe you just have a super heavy mouse? What are you using?
I suggest something like the G9X from Logitech. The thing basically allows to adjust the weight to your liking.
Gaming keyboards are quite important. Ghosting can be an issue. The ability of a gaming keyboard to accept multiple key presses at the same time and transmit that data matters quite a bit.
It's night and day when you A/B them. Also a good mechanical gaming keyboard allows you choose the keys resistance which drastically increases your response time and wpm.
It's like to high end headphone, until you've had time to sit down with a proper setup, you can't really know what you're missing.