Earlier quoted context omitted.
A single point of failure means if they gain access to one account they have access to ALL of your accounts. For example, if someone breaks into your email and you use that email for all of your accounts (banking, amazon, facebook, etc.) they can use email recovery to gain access to ALL of your accounts. If someone gains access to one of my accounts, every single other account is still secure because it uses an entir…
> If someone gains access to one of my accounts, every single other account is still secure All of your accounts are insecure from the start because a) you use passwords easy enough for you to remember, and b) you rely on email reset, which travels the public Internet in plain text.
Furthermore, nice assumption under 'a'. Mnemonics are a powerful learning device for memorization, I advise you look into them. The human memory is a powerful thing and committing several randomly generated password consisting of 20-50 characters it not "impossible".
https://en.wikipedia.org/wiki/Grand_Master_of_Memory
I do not remember my passwords. I remember mnemonics which help me remember my passwords. It's not entirely foolproof but it is far more secure than a single-failure-point system.