No, actually, you don't have the burden of proof, that's the point. If that was the case, following a US standard, say, should probably be as good a defence as following an EU standard. Instead, one particular proprietary standard is exempted from you having to prove anything, except for the fact that you do follow the standard. That special treatment is what is being criticized here.

Also, laws don't cease to be laws because they are not consumer oriented. Your argument applied analogously essentially would mean that it would be perfectly fine for all laws concerning the taxation of corporations to be secret because those are highly technical and not consumer oriented. These dumps are not meant for consumers, but for people who are required to follow the rules set by those standards.