There is a reason scouts require you to tie so many knots. Not that any scout remembers their knots longer than needed pass that requirement, but it is still important and once in a while they do need them.

The scouts require a bunch of utterly terrible knots. They include the Granny Knot which you never actually want to tie, only to avoid tying by accident. They include the Sheepshank, which is quite possibly the worst way to shorten a line ever invented. Etc.