One thing to be aware of with the "simpler" truing methods is that you don't notice if a rim is "wallowed out" from hitting a curb etc.
Aligning things from one side just makes the opposite side worse.
I recommend using a rudimentary caliper (like a large adjustable wrench) and run it around the brake track to look for obvious problems. IF it gets very tight in a spot, that spot is simply wider from side to side than the other spots.

Your post title sounds like you've been watching too much Inside Edition! ALWAYS the MOST!
I'd say NO because it isn't ALWAYS TRUE. Even if it wasn't just ONCE in a million occurrences.
IF you have a good wheel person at your LBS, A one time truing/tensioning should last the life of the wheel and be less expensive than buying tools.
IF you have a LOT of bikes, at some point N+?, it would be less expensive to buy GOOD tools and do it yourself, assuming you have a modicum of common sense/mechanical ability.