Agreed. A lot of scientific advice articles have been clear that your aim should be to reduce the risk of accumulating sufficient virus to infect you, so if someone breathing is expelling virus particles at a constant rate per minute that reach 1m, then it would be riskier to spend two minutes 1m away than one minute. But that really hasn't come into play in this country's public messaging, yoyoing between overzealous absolutes ("stay at home") and vague nonsense ("stay alert").
Some countries set a maximum permitted time for being in a shop (30 minutes in one example). I suspect you were unlikely to be fined unless you did something stupid like set up camp in a supermarket, but it was there as part of the public messaging.
England never did, probably because Boris doesn't want to upset businesses if at all reasonably possible and the absolute farking shambles at
Morrisons left me stood in the checkout queue snaking through the baby clothes aisles for almost half an hour on my last visit there.