The opening poster, and most of the commenters (I have not read them all) suffer a fundamental misunderstanding of how medicine and all other science works. Here is a very simple summary of how it works:
When someone announces an idea about something, typically called a hypothesis, other physicians, engineers or scientists evaluate it and test it. If it’s right, many people announce it is right and the hypothesis is accepted and used in medicine and other science or engineering. If it is unproven (like the cancer-is-fungus idea) it is ignored and disappears from the discussion.
So everybody just wait awhile, and if Tough-actin’ Tinactin starts advertising itself as a cancer cure, and doctors start having success in treating cancer the way they treat other fungi, the opening post will turn out to right. But do not hold your breath, because it takes a while.