a lot of technical interviews use super contrived problems for you to work through. There is a non-zero chance that a super experienced engineer could be qualif

a lot of technical interviews use super contrived problems for you to work through. There is a non-zero chance that a super experienced engineer could be qualified for a job, but stumble on the applied questions asked by some interviewers. leetcode is intended to help that type of interviewee get up to speed on a lot of those sort of technical interview questions that they may not have directly thought about for years.