We're missing a big opportunity here! Please fill the vacuum

You are right but we made out ok. The gov. knowing that we would have to pay for metric tools gave us up to 300 dollars to buy the metric tools and they also paid for a new tool box up to the value of the tools we bought. Back in those days tool boxes were no way as expensive as they are today.
The GM vehicles built in Canada came with a combination of metric and standard bolts etc. So you knew what tools you'd need to do the job and then crawl up under the dash to find out this car was all metric and sometimes it would be mixed. All this screwing around while on flat rate. You'd have to make money with your pen in cases like that.
Oh, we had the mutant metric/SAE standard cars in the U.S. too. Thank God a BFH doesn't care what it's hitting.