I wonder if hard questions, especially hard algorithm questions, has high false positive rate as well. Being good at solving those questions simply requires you

I wonder if hard questions, especially hard algorithm questions, has high false positive rate as well. Being good at solving those questions simply requires you to do tons of practice on leetcode, and those who are willing to spend tons of time are probably those who find it difficult to get jobs (or new grads). I don't think the skills for solving hard algorithm questions correlate well with the actual performance at work. Especially if someone is a new grad, they could be good at thise questions but don't have a clue about how real software systems are built.