I think the difference is between "BMW having to make the engine run as intended by the Brussels bureaucrats" and "A remap that makes the engine run as intended without any bureaucratic meddling with fueling efficiency...." The engines leave Germany working to satisfy the intentions of Brussels, not the needs of a normally aspirated 4 stroke engine.
'Bureaucratic meddling' as you call it is there to reduce unhealthy emissions - it isn't done just for the fun of it, or do you think it is?
The average levels of pollution (NOx for example) in London are very close to the WHO limits and greatly exceed this level many days each year (see my earlier thread on this subject) - the current emissins standards clearly aren't working.
So do you think we should have a free for all on emissions or not? Where do you draw the line?