I would argue it's more like running an email server.

No other password requires maintenance because he can be forgotten and reset.

Even running an email server is easier than self-custody. Because you can reboot it.

I don't not get your point, but remembering a piece of information is more like a password than it is like running an email server.

Undisciplined

No. You don't need to preserve a password with the same level of thought.

bitcoin

DISCUSS: saying "hold your own keys" is similar to "run your own email server"

Scoresby

No. You don't need to preserve a password with the same level of thought. 

You can:
1. Lose it and still have access to the website
2. Reset a regular password
3. Lose an account that can be recreated with no loss
4. Call customer support
5. Only lose data, not money

Wildly different barriers to adoption.