I think you’re overestimating most people’s ability to withstand the stress that quiz show style Leetcode interviews can put on people. I’ve literally blanked on an interview before when I was tasked with writing a simple parser and I’ve written entire compilers. The interview processes are broken in most companies. Pair programming sessions with debugging and incremental graduation of the problem scope are way better at assessing programming competency, because you also get a sense for how well the candidate can collaborate and communicate.