What you're proposing is making things harder to work in the hope that human intelligence will prevail. But the problem is that these cases are where human intelligence has failed, so making things harder is just counter productive. And this is why you can't prevent social engineering from happening and why crippling technology and creating a worse user experience just to try catch a few fringe cases is just a backwards approach to handling the issue.
Instead what we need is methods in place to verify the authenticity of senders and better education to users so that don't make silly mistakes like installing random "virus scanners" from web ads or clicking strange URLs in e-mails (and the URLs themselves could be standardised. eg no sub-domains become clickable, to prevent people falling for face.book.com).
Strawman; we're talking about email, where the combination of header forging and HTML mis-labeling are what's really dangerous, not web pages.
Claiming this is a straw man argument only demonstrates how unwilling you are to view this from another's perspective. At least I've listened to your arguments and come up with potential workarounds.