Using h$ headers?

Question

Search Engine Optimization

So the question is:
Why is everyone using the h1 title on the first screen? Will using an h1 header work somewhere in the middle of a site with a mountain of seo text and keywords, and put h6 on the first screen and fill it with CSS ?!

Answer 1

write CSS

What is hidden under this term known only to you?
Maybe because it is logical for the first title "bike", and then "green bike pictures". But this does not mean that it cannot be otherwise.
with this approach, it doesn’t matter how to arrange headings, more here
I advise you to read: how to arrange headings

Answer 2

So the question is:
Why does everyone write the title of the book on its cover? Would it work to use the title somewhere in the middle of a book with a mountain of text, and put the title of the 50th chapter of the book on the cover?!
So the question is:
Why does everyone insert the title of the movie at the beginning of it? Will the use of the title work somewhere in the middle of the film with a mountain of special effects, and in the first minute put the name of the screenwriter of the 3rd chapter?!
So the question is:
Why does everyone write the title of the document on its 1st page? Will using its name work somewhere in the middle of a document with a mountain of text, and put some crap on the cover?!