You don't seem to know much about Texinfo. It is definitely very much about semantics - quite like DocBook. I agree DocBook takes the semantics thing slightly further than Texinfo - but it has big holes too: For example DocBook doesn't have a standard way to specify the structure of a command/function synopsis except for the C language.
The reason that DocBook is so "verbose" is that it actually indicates what things are.
One reason DocBook is so verbose is because it is XML, which by definition is verbose and human-unfriendly.
I've written plenty of documentation in both Texinfo and DocBook. They're both reasonable formats, but it is clear that DocBook is very tedious if you have to write it "by hand" rather than use a word-processor. Texinfo is much easier to both read and write, and it handles the "semantics" pretty well.
I'm skeptical, given how frighteningly many cases where someone has been proven innocent after years in prison based on a single eye-witness or jail-house informant, which we know are extremely unreliable, or scientifically bogus evidence, or coerced confessions and plea bargains.