That's one way of looking at it. But there's also another side of it: this type of interviews let you change career path. Imagine that you're run-of-the-mill j

That's one way of looking at it. But there's also another side of it: this type of interviews let you change career path. Imagine that you're run-of-the-mill java programmer, but you'd like to dive into Machine Learning, or BlockChain, or whatever. Some companies will require you to have 3 years of previous experience before considering you for such job. Others will give you a Leetcode interview to ensure that you're smart, and then let you learn the actual tech stack on the job. Also, Leetcode problems might be removed from everyday development work, but most of us did learn those things at some point, i.e. in college, so asking them in the interview kind of makes sense, it's kind of "common denominator" for all programmers.