To be fair I think it is a proof that the person can learn all of the leetcode stuff and therefore they might be clever/disciplined enough to learn new tech as

To be fair I think it is a proof that the person can learn all of the leetcode stuff and therefore they might be clever/disciplined enough to learn new tech as well. Although I don't find it very relevant. When I was fresh out of university, I was good with algorithms / data structures (neither of which I use much in actual work), therefore able to pass leetcode interviews just fine. Yet it was at the time challenging for me to learn new frameworks and I found all of the tooling I never heard of rather confusing.