Tied to machines that make me be, cut this life off from me...

So... I have been reading 'Johnny got his gun' which started a lengthy conversation last night...
You see, I have been aware of the book for years, saw the movie a long time ago. I was aware of the movie / book due to the Metallica song 'One'. It is about a man who goes to war, and loses his arms, legs, hearing, sight and speech... he is to all intents and purposes trapped inside his own mind.

So for once, here I am ranting (as usual) about something pretty serious (not so usual). You see, the conversation it sparked, was a healthy debate about what we would do in the same situation. I for one, Would not wish to live in such a situation.
And it occurs to me that it is against my human rights that this one pretty massive decision would be taken out of my hands. In Switzerland you can choose a dignified and respectable end, IF you have a valid reason... you cant just decide you don't like your life any more... But, you can choose to end things on your own terms if you have a terminal illness, you can choose to slip away peacefully, treated with respect by the people around you, no pain, and a little bit of dignity.
So why is this illegal? If (in a similar situation) a friend choose to come to Switzerland with a person who had chosen this option, would they then be arrested?
Why is it, a pregnant woman can terminate quite late into a pregnancy if she discovers the (well formed, by this point) child has a high possibility of something like down syndrome.
When our pets are ill we choose to 'do the right thing by them', if they are suffering, then a trip to the vets and you can choose to give them peace, to end their pain.
We ourselves can choose the 'do not resusitate' option in hospital. We can choose for our organs to go to others in the event of our deaths. We have so much freedom over these things!
Yet we have to suffer the indignity of a wasting and painful death if we are ill... we cannot choose to come to a more respectable end on our own terms.
And yet we live in the age where we are supposedly free to live as we please, we have choice over religion, sexuality, career, we can sign up to fight and die for our country if we are healthy enough. We can starve ourselves, over eat, we can shut ourselves off from everyone or over indulge in every aspect of life. So I really don't understand why euthanasia is such a big issue. The screening process is designed to ensure that it is the correct option for the people who choose it.
Freedom should be ours, choice should be ours!
Euthanasia should not be illegal, It should be a choice that every person should be free to make! It should be a right!