baking It's not an analogy, it's the reality of what happens because there aren't enough organs to go round. Children lose their parents because not enough people are signed up to donate, even though many of those people aren't opposed to the idea. That's the truth.
If people feel strongly enough to opt out, they will. I think it's ridiculous to talk about the NHS 'plundering' organs, what an emotive and irrelevant word. What exactly do you think their evil motives are for this bodily piracy?
You said in your previous post that "I won't need my organs where I'm going", I don't really see how that squares with the idea of them being "plundered" - can you clarify? What use do you think your family will be able to make of them?
Like everyone else I've lost people I really loved and grieved painfully for them. I can't imagine that knowing all of their organs were rotting/burned with their mortal remains, rather than helping someone else to have life, would be a consolation.