> If you have a pacemaker implanted, do you believe you have the right to modify and update the software that operates it?

Yes, of course. It is abhorrent that people have devices implanted into their bodies and are in any way prevented from obtaining every last detail about how those devices operate.

> Separately, do you think it's remotely a good idea?

In rare circumstances, yes. See, by way of example, Karen Sandler's talk on her implanted pacemaker and its bugs, for specific details on why one might want to do so.

Not that person, but yes. You have entirely missed the ability to simply view and understand what's inside your own body.

Where your interpretation means someone else needs to follow your whim for their own problem, despite the legalese stating otherwise.

I think that is an absurd position and I am sorry to feel the need to have to be blunt about it.

Obviously yes to the first question. How could you possibly not have the right to operating your own heart. Naturally it would generally not be a good idea.