I wouldn't put it like that, I would simply say that Imperial is used in daily life, and metric is used in official documents.
You get a pint of milk for breakfast, before getting a quarter pounder on lunch. On your way home you drive the legal limit of 30mph to your local Sainbury's to pick up a 12 inch pizza, then you return home following the distance signs in miles, passing through the tunnel that says it's only 10 feet tall. You get it on gas mark 6 before eating it. But when done, you venture out to the shops to find something that fits your xinch waist. You might even get your size 10 shoes.
When you return home, you find an unwelcome mail delivery telling you you used too many cubic feet of gas, and might have to pay more in your next bill. But you are satisfied when you see someone accepted your offer to buy a 130 square feet apartment, and that the 18 inch alloy wheels you need to replace are on a discount.
Off to the sofa with your pint of beer, happy that your new car in the garage does 50 miles to the gallon, you now watch who can score in the eighteen yard box.
I mean, the only time the average person uses metric is when filling up fuel to the litre or getting the temperature, although the oldest of the old people still use fahrenheit. Otherwise you must be one of the very few million people who use metric at work. But then you're back to imperial outside of it, or even in internal communications.
Hence I wouldn't really say it's that bad. We're pretty consistent with imperial...