I'm only three years in and still inexperienced, but I would say the top three overhyped things are as follows:
Lure: I have yet to catch a coyote on lure (yes, I'm inexperienced) Imo a well-placed snare outperforms every time, and lighter too!
Trapping in the water for coon: I like to be near water, but a DP on a trail works better imo.
Finding 'the' spot for a coyote trap: I'd rather gang set snares on 20 faint trails than try to find 'the spot' every time. I took five coyotes off of roughly 60 acres with just snares, including a really old smart one that knew where all my traps are.

A caveat to all I've said above; I am yet inexperienced and my opinions may change as a branch out and cover more territory and get more traps out.

Taking a breeder right off the hop makes things a lot easier with wolf trapping...... if your goal is to take out the entire pack. That ain't overhyped.

Vechile maintenance.
Just catch more furs and buy new trucks.
With ac of course.

I got to sell these coons to pay for this truck
to catch more coon.

Try and smile.

Swivels on the end of a snare.

Big pans
Colored objects
Secret sets
Secret methads
Colored lures
How important targeting alpha males is in a depredation setting
How important alpha males are