It's the same number in different bases and divides out to 3 dozets(I made this up) in base12 and 6 digits in base10. Our friend you replied to was pointing out that it was a mistake to adopt base10 measuring instead of throwing out base10 counting because base12 fractions divide more easily due to the increased factors. And he was right.
Ok, I reread their comment and I see what you're getting at. Base 12 would be better in many cases but I just don't see anybody switching anytime soon. We would pretty much have to start over. If people had 12 fingers we probably would have started on base 12 to begin with.
Cultures that used base 12 counted on their finger joints with their thumb. 12 for each hand. Many common folk did that since you could count much higher if you counted by the dozen using both hands. Go from counting to 10 to finger counting to 12 dozen or a gross(144 in base10). Since we still have the English words for base12, you can see how close we were to adopting it.
Well sure, by that logic you could say all cultures use base 12 because there's 60 seconds in a minute, 60 minutes in an hour, etc. but are there any cultures that use base 12 for pretty much everything?
Metric drill bits are measured in mm and hardy anybody needs that much (0.33333... mm/cm) precision. I have a set of metric drill bits in 0.1mm increments and I personally might not ever need greater precision than that. Maybe in some lab environments they need greater precision but I imagine once you're on that level it would be custom anyway.
0.33333… is what happens when you try to divide 10 by 3. This is because 10 is such a broken number that 1/3rd (a pretty common fraction) becomes an infinitely repeating decimal. In base12, 1/3rd is 4.0. Metric is broken by design because it's based on base10. Lets take the lessons learned from the metric system and invent something new, something better, something base12.
In retrospect I definitely would have liked a duodecimal metric system, but we have what we have at this point. It's good enough and a DAMN sight better than imperial.
I'm not defending the imperial system. I'm saying the metric system is also stupid and we should have gone with something base12 instead of base10. There's nothing special or magical about the number 10, our numerical system is only base10 because we have 10 fingers. That's not much better than a foot being based on the size of the kings boot.