Bowlingshoes, yes there clearly was an element of speaking at cross purposes, but you didnt specify 'imports' in your earlier comment, and considering the line of discussion, it was a rather subtle flip to the other side.
So, lets flip it over and come at this from 'imports', and specifically the point you are now making, imports from non-eu suppliers.
A requirement of our current EU club membership is that currently we have to verify ALL imports abide by EU approved regs. (Though clearly we dont manage this, see squishys 'online chinese purchase through the post' conundrum)
We have to also charge the EU set tariffs, and charge the EU set tax. Thats ALL imports, including those from Germany, France wherever, as in reality, a German supplier is just as capable as a Kenyan supplier of cutting corners. EU membership does not mean, a German supplier has the right to ignore everything, if he sells within the EU to a French retailer.
The first point is, the UK, and the UK alone, own that obligation under our terms of membership, on imports into the UK. We are legally obliged to ensure that all imports into our EU state, meet EU requirements. The staffing, the processes all exist in the UK to currently meet that requirement on ALL goods.
The remain argument often confuses 'free trade' with regulation free. That is not true.
My second point, is the source of those regulations. The boards who set these regulations, that the EU then adopt, on the whole stand alone from EU membership. This is something that has been encouraged for donkeys years, by the WTO, to bring up the standard of goods world wide.
Your 'theoretical' argument, is that for some reason, the UK, the day after brexit will sack all staff who work in this area, and remove all regulatory requirements. Why would they do that? We cant legally have a set of regulations for one source of goods (like the eu) and another set of regs for another source of goods (kenya). That in itself is illegal and flies in the face of all international trade agreements, the WTO etc, as 'preferential' treatment. So like tax, whatever regs the UK applies, has to apply to ALL imports, exactly as they do today.
So take the Dyson position for example. If we allow higher powered hoovers in the UK, Germany, France etc must have the same 'freedom' to sell higher powered hoovers to UK suppliers.
Its not for the UK to say, Germany you can only sell us low powered ones. Anyone world wide, could sell high powered ones, including a German manufacturer, into the UK. He just cant sell them in Germany.
Its alarmist, and unfounded, to say the UK are ineffect going regulation free post brexit, and mis-understands the existing import requirements and who 'owns' enforcement of those requirements.