Isn’t the whole idea behind the benefit a free/freeish market provides that it is the most efficient system for allocating resources?
Mind you efficient != resilient
(to be fair to the gov, not sure how they could have operated differently without advising everything the remain side was warning against. Which would have worked I guess, but would have also been bizarre and probably tanked the economy [more])
So based in that, how can it efficiently allocate resources? Given time, sure, maybe in theory. Which is great unless you're a. a business that has actual costs now or b. a real person that needs to eat and pay rent now.
With above in mind, I don't think it's about resilience. Maybe that ultra-simplified answer works! But it seems a pat free market 101 answer -- ignore the context, market will fix it.
I get why you've said this, but I'm not sure this kind of flippant remark is helpful -- what exactly isn't rocket science? Is it the actual act of training a truck driver? Is it the act of writing down the things needed to get more truck drivers?
Actual process is non-trivial, expensive (you need to persuade people to leave their families), time consuming and involves a chain of other non-trivial time-consuming tasks that currently doesn't really exist (or is at least regionally bottlenecked).
Sure the market will probably eventually sort it out, but that seems neither a quick nor an efficient way of doing things in this case, where this was widely predicted years previous + is now critically required