I can recommend some driver training!
The vast, vast majority of the time, "warped rotors" are not actually warped, in a physical sense. They have uneven pad material deposited on them. A "warped" (like a Pringle) rotor probably won't actually pulse the brake pedal, as the fluid volume will be constant as the pads shift back and forth. And that's not how they fail.
What happens, most of the time, is that someone is stopping the vehicle, and then continuing to stand on the brakes. This presses the hot pad (from the braking) into the hot rotor, and you end up with literally a pad-shaped deposit on the rotor as the pad material bonds to the hot rotor. If it's really bad, you can actually see the stamping. That leads to uneven thickness, which leads to pedal pulsing as the pads are pressed back in once a rotation.
I've had this problem with cars before I learned about how the pad/rotor interface worked.
The solution is pretty simple: Once you've stopped, use as little brake pressure as possible to keep the car stopped. I drive a manual, so I often don't even have the brake pedal pushed at a stop on level ground. You've got an automatic (almost certainly), so you still have to keep a bit of pressure, but not much.
Another suggestion is to be gentle the last 50' into a stop. Coming off a highway, get the bulk of your braking done early, then roll with very gentle braking the last 50-100' into the stop, and then relax the pressure.
I bet your problem goes away. ;)
Even better, you can often resolve moderate pad deposit issues by bedding the brakes. Do 5 or 10 60-10mph hard braking events (without triggering ABS), then drive 15-20 miles with minimal braking to help cool everything down.