People want convenience and security concurrently. We know from our efforts at securing physical systems that this isn't possible. What makes you think securing electronic systems will be any easier for the end user, especially since physical harm is not a deterrent to an intruder?
To always be on our guard, to never take things for granted, to not trust even what seems like the most fundamental methods of communication, these are not things the (normal) human brain is wired for. Yet, that's what's required of security in the digital age. This just isn't something humans are evolutionarily prepared for. Our brains are wired to trust. They are made to accept others at their word. That is the mentality of a normal person.
Many years ago, people were tricked by door-to-door con jobs. Today, the same con men can hit every door in the world all at once. The only way to win is to not play. Or, in some cases, play with very low, inconsequential stakes.