In any business, company, organisation, people make decisions that after some exploration prove the wrong choice. The entire tech industry operates in an 'agile' way now, constantly rethinking ideas, plans, and throwing out the bad/failed ones if they don't live up to the hype or fulfil requirements. This is not a new way of thinking, it's common sense checking. Now that government has explored Brexit, it's high time they put the options back to the public.
You wanted it. We've explored it. Here's our proposal. Now what do you want to do?
This is still democracy!