That defeats the entire purpose of the feature. I want my computer to be unusable if stolen.
But most of us don't want to extend the courtesy to petty criminals.
Even though at any point said device can be unlocked, transferred, sold etc.
Given Apple's staggering pile of cash, I think that we'll have decades of warning if they're going to stop existing.
It is to stop devices being stolen, wiped and re-sold. It is an attempt to allow the legal owner of the device the ability to control who can use it, rather than the possessor of the device having full control who can use it.
Its only purpose is to protect the use of the device by people removing all the software (erasing back to factory defaults) and taking control of the physical device that way.