Developers know (at least should know) because an experienced qualified subject domain experts are an integral part of the development team. If subject domain expertise is not part of the development team there is a much bigger problem.
While I appreciate Autodesk developer's desire to engage the user community in the develop process, the user community should not be expected to provide missing expertise. I want/expect my CAD vendor to be the expert on the product and the industry (user base) it is targeted towards; to be one, two, three steps ahead of me with respesct to improving existing functionality and dreaming up functions/solutions that improve my work output productivity. As an end user I live in my own little bubble focused on my own navel; end users do not have time to think in terms of long term product strategies. This is why many user submitted product enhancement requests often appear petty and are not well thought out; something I am guilty of.
The title block "problem" is not new and has been "solved" many times by every CAD vendor, albeit, every solution I have seen is far from optimal. Every CAD vendor seems to have made/make the same mistake thinking there is a one size fits all solution. The solution may look fantastic in a product demo sales pitch, but in reality it falls short of the needs of the organization; unless the organization is willing to accept its limitations it cannot be used. An organization that has no history of drawings might be able to swallow the CAD vendor provided drawing format/title block solution, but most cannot. Established organizations invariably end up ignoring the CAD vendor delivered solution and patch together a suboptimal solution that addresses the immediate crisis of getting drawings released, so products can be made, and sold.
As a side note I want to state that one cannot separate the "Title Block" issue from the drawing format issue; they have to be addressed together.
It is the responsibility of the CAD vendor to provide the basic tools to create and manage drawing content, this includes title blocks and formats. Unfortunately, the tools required to do this are not present in Fusion 360. The actual tools/functions required to build and manage title blocks/drawing formats are quite simple. I could enumerate what is needed, but that should not be necessary; it should be obvious to the development team.
DIsclaimer: I do not consider myself to be subject domain expert in this area. Whatever expertize I may appear to have was obtained strictly as an observer, however, I did contribute in one of those "patch together a suboptimal solution" activities.