Rob, can you explain this process to me? Like a specific example of how you would use these controls? Because yes, I do want to make drum patterns from scratch.
I'm not sure what level of background knowledge you have of DAWs etc, but I'll assume some. When you're wanting to record, the normal way is to press record in the DAW. Usually with a mouse or key command. Same with stop, play etc. There are ways to make some things easier such as loop-recording and auto-punch but I'll leave that alone.
So when you're recording via midi keyboard or drum pads, you need to move a hand over to the mouse, move the pointer onto a button and press it. Straight forward enough, but....
Press record, start playing, don't like the rhythm, press stop, delete, move the cursor back to the starting point, press record, play, like the rhythm, press stop, move the cursor back, press play, tap the pads to work out the next layer, stop, rewind, tap again. Ready? Rewind, press record, doesn't work, press stop, delete, rewind, record, play, got it this take! Rewind, press play, how's it sound? Great? Next layer, rewind, play, tap out next part over existing part, sounds good, stop, rewind, record, tap out part, stop......ad infinitum.
The amount of movement required to constantly control the mouse, arrange the cursor, press buttons and so on, is greatly, greatly, simplified by having those transport controls right on the drum pad box.
Generally speaking, I start with the biggest, deepest drums (taikos, timpanis, frame drums), then move up the instrument chain through toms, smaller frame drums etc lastly to things like cymbals, sticks and wood blocks. In your case, you'd probably be using a normal acoustic drumkit, but the process will be much the same. You keep adding layers until every part is recorded for the whole kit. Transport buttons close to hand make the process less frustrating.