All of that is completely true & it needs to be addressed. The differences between the regulators range from stupid to confusing & tend to be based more on 'butt covering' than concrete evidence.
However, SLF & those sending freight are generally not qualified to make a decision as to what is safe & what is not. Nor are they qualified to analyse the various regs & decide which are sensible & which aren't. That being the case, they should be following ALL the rules & going through appropriate channels if they feel something needs to be changed.