I've probably hung a thousand fans in my career, and have used those little balancing kits that come with the fan exactly zero times. I always....
-Make sure the blades are tight and at equal angles.
-Don't hang super cheap fans.
-Don't drop the fan motor on the floor.
Every time I've done those three things I have had close to zero wobble.
I'll be honest, I wouldn't even know what to do with those little weights that come with the fans. I would be curious to see if there was anyone that had the patience to mess with them.