We have been authoring HTML by hand for decades with ease. Text editors are very good at it, and many have commands to auto-wrap, auto-close etc. Reading and writing is simple.
You have been authoring HTML by hand for decades. Not every SWE is a FE dev.
>We have been authoring HTML by hand for decades with ease
No, we've been generating it with templates or authoring templates.
Authoring HTML by hand is a very early 2000s thing to do.
Templated though, not manually writing it out for every blog post say. I think GP means it just has more friction as a writing format than markdown for example.