Is expertise the means, or the end? How would be an expert in x or y improve your day-to-day life?
Counterpoint: on a whim over Christmas I bought a flute. I don't play a musical instrument, I've no particular musical talents, but I've been working at it consistently if not deeply, half an hour a day, every day, since. I will never, ever be an expert at the flute. I will be better at it though; there are pieces I can play in August which I couldn't play in July. It adds to my life. If the goal were to become an _expert_ flautist then a) I would be delusional but b) it would no longer be a nice little interlude in the day. Were I to magically mature into a concert-level flautist, _would I enjoy giving concerts?_ Pretty sure the answer is no. Expertise is neither a realistic nor desirable goal.