To be clear, my main issue, if any, is the misleading headline. People have posted Show HN things they've used AI to help build (partially or completely). However, saying this is from scratch if it isn't is straight up lying. Moreover, the fact that this is on the front page is likely due that claim, so the reality of it is important context for readers, I imagine.
It seems this was posted while I was editing my comment. Essentially I agree, but feel like you have to make allowances for beginners in both coding and in how they conform to community expectations.
I can see how someone using AI would consider something made from scratch differently. Similarly, in the past using a batteries included language wouldn't have counted as from scratch to someone who had to write most of their support code themselves. Go back further and you'll probably see people considering the idea of using a compiler written by someone else as not from scratch.
Unless you want to go full NAND to Tetris, the notion of from-scratch is contextual. Maybe it's shifting under our feet.