Ok, it boils down to this
An I phone is in reality a very small computer with a telephone ap. As a computer, it can be locked down and subject to a pass word for entry
At the office, in the cubicle or research lab, there are computers that are networked to the corporate or personal crown jewels. They are locked with a password.
If the I phone small computer can not be locked, then the reasoning must be that neither the cubicle nor the research computer can be locked.
There can be no computer security
When Apple protects the small computer with the telephone ap, Apple is protecting all computers with all aps.
It is just that simple
Wut?