Once you know how to solder
, you are sooner or later going to need to know how to desolder (more likely sooner than later). Desoldering helps you undo all of those terrible soul-crushing soldering mistakes.
Desoldering becomes an important skill to possess, because you will need to be able to do it to remove the servo controller boards. Removing these boards is necessary in order to build most of the bots.
Fortunately, this is an easy skill to learn!