A bridge failing is a high likelihood of death or serious injury. How many people died or were seriously injured in the latest Cloudflare outage?
For life or death systems, I agree that we should be looking to implement analogous processes/systems to a structural engineer or doctor, etc. Cloudflare is not a life or death system. If you operate a life or death system and you have Cloudflare as a single point of failure, for some reason, that should not be Cloudflare's problem.