Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
羊羔有跪下接受母乳的感恩举动,小乌鸦有衔食喂母鸦的情义。
Lisp is worth learning for the profound enlightenment experience you will have when you finally get it; that experience will make you a better programmer for the rest of your days, even if you never actually use Lisp itself a lot.
Given the choice between the experience of pain and nothing, I would choose pain.