Full disclosure: I am the author of the Wikipedia essay "Wikipedia has cancer".

See https://news.ycombinator.com/reply?id=21700802 and https://en.wikipedia.org/wiki/User:Guy_Macon/Wikipedia_has_C...

I carefully considered the above objection when I first wrote my essay, but I decided against removing the cancer analogy. I though that making an analogy that would be remembered was important. For what it is worth, I myself am a cancer survivor and even after 10 years of it not coming back I still sweat bullets every year when I do my annual cancer screening.