As it happens I do run a large organisation - I delegate. A 2m to 1m change does not require powerpoint presentations and reports or even meetings.For a large business to execute this nationally would obviously be something that requires some planning and preparation. Same would go for the decision to remove it all. It's all tied up with the wider strategy which includes the questions over the number of people are allowed in at any time and what staff do what role where, and other things. And fundamentally it would need to be answered what the benefits are?
Your view might be that they should abandon it all and do nothing, but unless you're running a large firm...?
I don't think this is true at all.
You tell your people to go and put markers halfway between the existing ones. Nothing else changes!
Trying to make something so simple, so complicated is symptomatic of both the railways issues with costs and the mess the country has made of covid.
You use the word “strategy”. That is your misconception. Strategy is carefully thought through based on an underlying concept. Not made on the hoof on poor data - that is seat of the pants management. Whet we have in social distancing is window dressing, but exceptionally self damaging one - as the stats bear out, it is not actually doing anything but is devastating 10s of millions of lives.