Placing a can in a bucket of water isn't really the same kind of test as getting in and out of a kayak for two days either. Throw the tin in a vest and do some real world stuff to compare with your bucket test and see if the results are the same.
I'm sorry if the bucket isn't real world enough for you, but I'm not motivated enough to do a well planned experiment for an internet argument.
But frankly if you go kayaking with the bare tin which is never meant to be water resistant much less proof in your pocket, you really should rethink your common sense, at least put it in a small freezer bag for instance.
I think people are exaggerating and over reacting.
How exactly? Please explain
Go back and read your own title and 1st post?