I feel that people like Austin Kleon, although also a part of the self-help genre, add a sense of fragility to their work.
Because not everything that is meaningful can be measured.
Before you optimize a task or function, take a step back and consider the goal. If extreme efficiency is the only goal, by all means optimize away — because that will make you happy.
But if a personal component is involved — purpose, or meaning, or satisfaction, or fulfillment, or self-awareness, or any number of other emotional rather than quantifiable outcomes — then make sure optimization doesn’t require too high of a cost.