Thank you for the OP. I started off making drum tracks this way. But I was never satisfied with my own keyboard-drumming. My performance never sounded like a real drummer. I though it maybe it had to do with trying to play drums on a keyboard. I imagined that I was probably the only one trying to play drums on a keyboard and needed to try some kind of drumming MIDI interface.
So I investigated using a little digital drum kit like the Yamaha DD-65. Much worse. The physical skill to swing drum sticks is very different than a keyboard player tapping keys.
This video tells me that I was on the right track originally. Yes, others do this. Yes, you can create something decent with some practice and attention to detail.
A keyboard is what I know. Stick with what you know.
At the same time, I'm uncomfortable banging on my expensive midi keyboard that's really for expressive piano. Maybe I'll pick up a cheap non-weighted unit to pound on.
Thanks again.