I was a bit surprised to discover that using headings is considered "yelling here" (see edit here). I'm familiar with the idea that ALL CAPS is yelling, that's common across the internet standard. But I've never seen references to headings being described as yelling.
<h1>) headings is yelling and somehow forbidden here, might it be worth engaging with SE to have the CSS of headings shrunk a little.
While the difference for sighted people is just font size, there is a semantic difference between
<h3> that may be interpreted by screen readers and anon.
It seems wrong to me to edit down everyone's headings (adjusting the semantics) because we don't like the font size.