On approach and landing I've seen Power for speed, Attitude for rate of descent and vice-versa. Bursts of throttle to 'cushion the landing'. Dropping the flaps to 40 degrees in a 172 at ten feet..for a 'positive touchdown'. Crabbed and wing-down x-wind approaches . Bomber circuits at grass strip fly-ins etc etc. They've all said that this was what they've been taught.
There is a big difference in some of these techniques, some, such as crab/wing down for crosswind are just different methods that are equally valid, others are just WRONG (Dropping the flaps to 40 degrees in a 172 at ten feet..for a 'positive touchdown'.

), I have no problem with different methods as long as they are safe