I'd say it's worse than that.Parliament HAS debated the issue but there is such a strong lobby against 'assisted dying' (or whatever you want to call it) that the necessary laws are never passed.
I think it quite ironic in the context of the recent abortion ban in USA where the 'pro' lobby argued that women should have 'autonomy' over their own body, IE the right to decide for themselves, yet the anti-euthanasia lobby is expressly against such a right.
Surely the freedom to choose what to do with our own lives, including ending it when and how we wish, is the ultimate right of everyone? What right has anyone to deny that?