If a technical person with a bit of knowledge and a few minutes has access to your computer then yes, you're a bit screwed.
If the broadband engineer comes round to investigate your connectivity issues and you (sensibly) watch over their shoulder while they fiddle with your browser settings, looking away for 10 seconds shouldn't result in them having ALL your passwords.
It's about ease & simplicity of breaching the "security" for non-technical people as well as techies.
Comments
If a technical person with a bit of knowledge and a few minutes has access to your computer then yes, you're a bit screwed.
If the broadband engineer comes round to investigate your connectivity issues and you (sensibly) watch over their shoulder while they fiddle with your browser settings, looking away for 10 seconds shouldn't result in them having ALL your passwords.
It's about ease & simplicity of breaching the "security" for non-technical people as well as techies.