Earlier quoted context omitted.
Well, clothes are mostly down to weather and laws on public decency, and nudists are the counterpoint that prove some demographics would prefer to be naked if the law allowed it, same with tribes like Koma. Locks are more for security than privacy, and it's important not to conflate the two. People can have nothing to hide, but also not want to be robbed. And as for email, that's again a matter of security because th…
Email passwords are not for preventing impersonation. For one, POP3 passwords are separate from SMTP. Second, nothing in SMTP prevents impersonation… large mail handlers like GMail don’t allow it anymore, but you can put whatever you want in the “From” field. Things like SPF, DMARC and DKIM are there to prevent impersonation at the domain level for mail servers that want to protect their users.
With what I had in mind, if you logged into my Gmail account, which provides both sending and receiving, you could impersonate me to my own mother, but I would have nothing to hide as I don't receive any sensitive information via email (privacy). However, accounts elsewhere could be recovered via my email, and thus be used to impersonate me elsewhere (security).