The wiring regulations and associated legislation (on sockets etc) have developed in stages over the last hundred or so years.
As a result, the way they have developed is a product of the technological development over that time and of choices that were potentially made decades ago in very different environments.
When BS1363 socket or ring mains were developed, I doubt the people about them were considering a world with inexpensive multi-poles RCBOs, 8000 series Al alloys or the electronics of today.
So, if you could start from scratch with a new wiring regulations system to best achieve affordable, effective and safe electrical systems for installation in domestic or light commercial environments, how do you think it would differ from the status quo?