Imagine you're a programmer on an accounting system - like Sage or Dynamics or something like that.

You agonise for years over the perfect security systems, audit trails, corporate transparency and compliance support logic.

Then the end user just bins today's datafile and restores yesterday's blowing all your beautiful logic to smithereens in a an otherwise obvious action that simply did not belong to the domain of said 'security logic'.

The ability to do that or not do it is the difference between a bearer token and promissory note for such.

Any honest apologist for bitcoin would admit what the real priority is here - which is leave the protocol untouched, and not to improve its monetary properties natively.