Awesome effort, but I'm afraid I had to reject the edit. You're right, invalidating existing good answers with a radical edit to the question is not... good. Edits are always welcome and in general I'd say be bold and edit, but when there are already answers it gets a bit tricky. If you think about it, your edit, if approved, would leave us with a +5 answer that didn't really answer the question (strictly speaking: not an answer).
Furthermore, the question (at the time you edited it) was not closed. Although I can see why you felt certain it will be closed soon, you can't ignore the possibility of it staying open. When you feel a question is in need of a radical improvement, your first instinct should be to get it closed, and then edit.
This, of course, would have been a far different discussion if you've submitted your edit before the question had an answer. Although your version of the question is still not constructive (imho), it's a step in the right direction and I would probably had approved the edit, just removing the sentimental opening sentence would be good enough for me. Not enough to salvage the question, but certainly a good edit.
Lastly, I want to emphasise DVK's point about getting a second opinion before a surgery. Discussing radical edits is an excellent use case for our chat room.
PS. You can find some excellent advice on "heroic edits" on Meta Programmers (All of this has happened before and will happen again... again... again...)