I said above that imo that the people whose voice should have the most weight are the ones who live with that intense, incurable pain. You are one of those, so your view is not (imo) unrealistic. But you have to have seen there are an awful lot of anti-euthanasists who do say "but painkillers will solve the problem". I certainly have.
The fact that medical people are highly dismissive of pain, especially women's pain, is a severe problem and it's clear that for a genuinely civilized society this deeply dismissive attitude should change. If nothing else, because actually even if it were a mental issue, that doesn't make it any the less painful.
About the value of disabled peoples' lives (of whom I am one) - yes, it's seen as less. I can't work either and have been faced with that attitude too. It still comes down to changing societal attitudes and I agree that this is a huge problem in the UK. I don't personally believe that people would be pushed towards euthanasia by the medical / social professions in the way that people fear, in the UK. I'd be more worried that families push older relatives towards it to get the money. How to stop that? I don't know. But if you allow euthanasia as a country, then some injustices will happen. Equally if you don't allow euthanasia some injustices will happen. There's no simple clear easy answer.
It still doesn't alter the fact that "you'll feel better in the future" is often patronizing - people have quoted the Guardian article about the 29 year old Dutch woman who wanted to die because of mental distress as if it's a terrible thing that euthanasia was offered to her. Where is the respect for her, in that? if you read the article she knew exactly what she was doing, and why, and what the prospects for successful treatment were.
In the end, yes, some people may die who would otherwise have lived, and perhaps come to be glad of it. Equally, some may be refused end of life who profoundly long for it, know what they are about and should, in a civilized society, be offered the step out.
In the end it comes down to respecting people's ability to decide their own course of their lives. That respect is at the core of how I believe euthanasia should be handled. "But you might feel better later" regarding mental distress is a good reason to not extend euthanasia for some years perhaps, but after a certain period the consistent, stated desire to die and having gone through all available treatments, then I believe it is right to respect that desire.
It's also extremely cruel to leave people suffering terminal cancer who painkillers can't help to die in great pain. 98% of people in the NL who go for euthanasia go for physical reasons.
I think I've answered you as well as I can. Can you now address my concerns?