>Op claims to like cooking; hobbies inherently don't have opportunity costs.
Hobbies, like everything else, have opportunity costs attached, which even applies just between hobbies (e.g. practicing your X more happens to the detriment of Y, your other hobby), but obviously also between hobbies and work or other lifestyle choices.
There are tons of people whose hobbies have run afoul of their work, or family relations, or health, etc, as the effort, time, etc, for doing a hobby could apply to any of those other things.
Hobbies, like everything else, have opportunity costs attached, which even applies just between hobbies (e.g. practicing your X more happens to the detriment of Y, your other hobby), but obviously also between hobbies and work or other lifestyle choices.
There are tons of people whose hobbies have run afoul of their work, or family relations, or health, etc, as the effort, time, etc, for doing a hobby could apply to any of those other things.