[TuringTest]

That kind of scroll is OK-ish for a background parallax effect, or maybe some pretty fade-in/out effects while elements scroll into view (without changing their relative position in the page).

When it interferes with the main functionality of the page, namely reading the content, they break accessibility, distract over understanding the difficult topic, make the content brittle against changes in the platform (different browsers or future standard updates), and as others pointed out make it difficult or impossible to use alternative presentations.

With most comments commenting on the presentation and not on the content, I think it makes clear that it detracts from the experience more than helps.