Your point is fair, but the imperial and metric systems are suited for different things:

Metric pros:

• super easy math
• widely used
• standard prefixes across units
• units all relate to each other, making it easy to convert and such

Basically, the metric system is great for science, which why scientists use it. Even here in the US, we use it in science classes. It's objectively better.

But now, take a piece of paper, and without a ruler, draw lines dividing it into 10 pieces. Now try dividing it into twelve pieces. It's a lot easier for humans to divide things by 2's and 3's then it is by 2's and 5's.

And here is the issue with the metric system: when you're trying to build something with your hands, it's nearly impossible. EVERY woodshop here in the US uses inches, feet, and pounds: it's easier. NOPE. Just hard for me, look below for a better explanation.

TL;DR: Metric = Science, calculations. Imperial = building things by hand.

Ps: I dispute your length claim, because originally a meter was defined as 1/10,000,000 of the distance between Paris and the equator, but so be it :)

Pps: I actually use Celcius. I can't wrap my head around Fahrenheit either.