Absolutely no relation to my technical abilities for any job I'd be looking at (besides, of course, passing an interview to begin with).

Please don't get me wrong: if it was just a few days of practicing, I'd just get it over with and do it. But realistically, with the leetcode arms-race that's gone on for the past few years, where you're expected to solve multiple hard-level problems back-to-back, with no assistance, and as quickly as possible (ie: under 30 minutes), I'm staring down the barrel of probably 3+ months of full-time grinding to memorize as much of them as possible.

Just not worth it. I'm terribly depressed as it is already, and that would just make it much worse.

what if you just did it as a hobby/fun thing to do once or twice a week...?

maybe after a while it would be second nature once a real opportunity presented itself?