I guess it's a regional/local thing. Here you are expected to power load/launch almost 100% of the time. Doubly so if you have 2 people, you might get some slack if launching alone. Your expected to drive down the ramp with one guy in the boat ready to go (except maybe minus the winch strap and he'll do that after the engine cranks) - crank, back off the trailer and move to the beach area/dock till your partner returns. If your alone your expected to back down, crank, get off the trailer, beach, move your truck asap. Loading is the same thing, just pull up to the beaching area enough for the guy to get off and get the truck while you idle around and get on the trailer, get the winch strap down (many skip this part) and pull out.
Of course it's pretty common here to have more than 1 tournament on a weekend launching at the same launch and just one tournament might have 300 teams so there's a lot to launch in a short period in the morning.
You can take a lot more time at the smaller "community" lakes and it's understood that you know how to load/unload your boat by the time you take it to the "big" lake on a busy weekend.