I agree with danso. Your overuse of bold, especially for whole sentences, feels like shouting and not much better than ALL CAPS. Feels like being talked down to as if I can't decide for myself that a sentence says something really important.

> first scan the text looking for important stuff

That may work if you bold a few choice words or phrases, but not whole sentences. Every time I hit a bold sentence it breaks the pace of my scan.

Subheadings would work much better than those bold sentences.

By bolding so much, you've totally diluted the power of the bold!

Anyway, don't take an HN comment's word for it. Ask some writers you respect.