Also, separate comment because it's a separate thing. The analogy is actually perfect. We should be worrying about both things, the knife and the leech. The knife needs more immediate attention because the leech is actually pretty good at keeping it's wound clean and not kill the host immediately.

The problem I have with the sentiment of the tweet of the bank is the very likely intended focus on just the one side of this issue. Part of why this is a long-winded social issue is because many people don't take the time to analyse the situation more broadly. Because they have to deal with all the knives in their arms, and get reminded of yet more knives, that the leech can't ever become the focus of the attention.