and then I ask how they get their autopilot to slip on final when coupled up. Wouldn't you want your sight picture and technique to be the same all time, especially when popping out of the clouds at minimums? If you ever transition to larger airplanes, crab on final is the technique to know
It isn't clear what your experience of large airplanes is but the B757/67 autopilots will give an immaculate demonstration of a crossed control/slip approach.
Crab to minima tempts the pilot to straighten up when the lights come into view with a consequent downwind drift that opens a whole can of worms in trying to retrieve the situation at low level.
Kicking off crab in a large airplane at the last minute requires a measure of fine judgement only gained through long experience. It has led countless airmen to some very dramatic landings - without even mentioning the effect on the unfortunate souls in row 40.
Professionals should try and emulate the Boeing autopilot.