The best coder I’ve come across in my career once told me he attempted to solve some leetcode and was stuck fairly early and gave up. I was surprised to hear that he even cared to try.
What made him a fantastic engineer was his meticulous work ethic, his track record of never having missed a deadline, him spending 40% of his time designing before he even wrote a single line of code, writing extremely human readable code, his obsession with unambiguous and simple APIs and his extensive unit testing.
He was humble, loved to crack jokes and was always fun to solve hard problems with.
None of that is captured by leetcode. This is probably my personal bias - but the only people who work hard at leetcode are people who want to prove something to the world. I’d rather work with people who like the profession and don’t feel compelled to prove anything.