This is exactly the reason why Big Tech is in trouble. The candidates cram Leetcode for months to get the jobs, and since their practical skills are irrelevant

This is exactly the reason why Big Tech is in trouble. The candidates cram Leetcode for months to get the jobs, and since their practical skills are irrelevant in that process, we all wonder what the hell this army of engineers is actually doing. They are building unnecessarily complicated systems that you will need to hire even more engineers to maintain, that's what they are doing. But you pay them well, so there is that.