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.