I thank that you're missing some history here.
Since 1948, when a small group from the BGA led I believe by Anne Welch persuaded Lord Brabazon (aviation minister at the time) that the BGA was a competent organisation who wouldn't benefit from state interference, we've had a system in the UK where the BGA has done it's own thing. In the 55 years since, it would be far to say that Lord Brabazon's decision was proved a sound one.
Alternatively since the war, Western mainland Europe (for example France and Spain, the new controlling force in the EU) have tended more towards socialist-style state control of all things aviation than we brits have. One consequence of this was that gliders have been brought into the CofA system, along with light aircraft.
Come EASA, the core European countries like France and Germany got the casting vote - so we're doing it their way.
Now, let's be fair and say that there's nothing fundamentally wrong with the German way of dealing with gliders. The problem isn't with that, it's with the approach of forcing a 2,500 (or thereabouts) strong British glider fleet to be shoehorned into a system that they and their paperwork have never had to meet. So we are looking at a massive programme to fit in with requirements for licensed engineer maintenance, use of certified instruments, etc. which they've never had to meet. This will be a monstrous undertaking.
So, the Germans have no particular problem. The French have no particular problem. It's the Brits who have done things in a different way for 55 years who have a problem.
The converse interestingly is true of microlights. If microlights came under EASA regulation, there wouldn't be much of a problem so far as the Brits are concerned, it would just be a mild change to what's been going on here since about 1980. But France, for example, has never had state safety regulation of microlights (it's interesting to compare the UK and French microlight accident rates in the current GASIL by the way), and would be brought to a standstill if EASA forced them to meet UK level regs (which are still well below CofA standards).
I'm not offering a solution I hasten to add, other than possibly to get our own back on the French and Germans by saying that microlights should be EASA regulated, just explaining how we got to this mess.
G