Real life is more complicated.
Real life is more complicated.
Other laws still exist too.
Owning pillows is legal. Killing people is not legal. Just because owning a pillow is legal doesn't mean you can smother someone to death with it.
I would hope that someone diagnosed with a mental disorder such as Alzheimers would lose their drivers license (not sure if this is the case), but if they were subsequently cured and passed a new driving test, then would you have a problem with that?
You can throw the book at people taking any experimental drug that can have a gazillion side effects they have no clue about, but this doesn't help the people that might get killed because someone experimented with a cure, did not want to harm anyone but still did. People are not numbers, but real parts of the world and someone else's lives. Laws are there to keep people safe, but are just the last line of defense.
You can take both positions, but your argument is overly simplistic.
I gave the pillow example because it clearly shows how ridiculous it is to link things like this together. Your arguing that people should be denied experimental Alzheimers surgery because (paraphrasing) "maybe they'll feel cured, but won't be, and will kill someone in a car accident" (WTF?!), is no different to arguing that people should not be allowed to buy pillows because they might use them to smother someone.
Making laws against killing or endangering others (driving impaired, etc) is fine and desirable. Using the need for such laws to apparently try to make a case for banning experimental surgery is absurd.