I'm seeing a lot of justification for this tool (on the tool's page and in the comments here) based on the "LeetCode is bad, companies shouldn't test for orthogonal skills".

While I agree with that sentence broadly, tools like this undermine the process even for non-orthogonal skills. For instance, we administer System Design interviews and Practical Coding interviews (usually, we give the candidate a code base and ask them to make a modification to it)—things that are not LeetCode and are pretty relevant to day-to-day work. We actually let candidates use AI, as long as they show how they're using it. Tools like still undermine our process even for those types of interviews.

I'm a realist and understand that tools like this are inevitable. But I don't think they're ethical, and I think the "Fuck Leetcode" argument justifies their existence. In general, trickery is wrong (whether it's companies doing it, or candidates).