This is possible since years, we have docs which are explaining how to do that, including style-guides, reST-guides, issues tagged for new-commer ets.
There is for sure like always room for improvements but we have all this.
BUT, yeah sorry a but people have also willing to read and follow these. We have these for a reason :).
This is really depends what you mean by this, this is not always possible because of different content, tone, audience, etc.
For sure it should be consistent in terms of style and according to the audience
As many times already explained, one of the main reasons why the search is not working really perfect and messing up you search is not because of technical reasons.
It has ‘simply’ to do with the quality of the content, order, usage of header and written word.
You can find that also in my last talk I gave in Barcelona.
As you know we are also including lots of ‘external’ docs, for example also docs of bobtemplates.plone (not meant personal, no offense )
It would be really great if people who are involved and active in such try to improve these docs. This also would help the all over quality of docs.plone.org a lot !!