Why use a canoe trip as an analogy for a cancer journey?

Well I am specifically thinking of a canoe trip on a river as opposed to a lake or the sea. The nature of a river lends itself well to the nature of a cancer journey.

It can be long or it can be short.

There are parts which will be fast flowing currents and other parts moving more slowly. On medical treatment there are easy days which go quickly and other days when one needs to be patient. On a chemotherapy cycle there are times when it feels like one is going over a waterfall or down a series of rapids eventually to find a quiet spot to rest up.

Whats around the next bend in the river? Another waterfall? An island to rest up on?

Anyway it has been a fairly long journey to this point but still a long way to go. Still a lot to learn