Apologies for the metacomment, but HN is a funny place. There is a certain type of learning that is deemed good ('math for AI') and a certain type of learning that is deemed bad ('leetcode for AI').
What's leedcode for AI and which site is deemed bad by HN? Without a concrete example it's just a strawman. It could be the site is deemed bad for other reasons. It could be a few vocal negative comments. It could be just not happening.
I mean I kind of get it - overgeneralising (and projecting my own feelings), but I think HN favours introducing and discussing foundational concepts over things that are closer to memorising/wrote-learning. I think AI Math vs Leetcode broadly fits into that category.