This isn’t an “anything but metric” though.

They’re using a visual example of the size they described.

They didn’t say “that’s 22 meters” or twelve bananas, or whatever silly example unit might be subbed in.

Most people don’t have good spatial sense based off of raw units, no matter what those units are.

American football fans tend to be good with yardage, so I assume regular football fans probably are similarly capable with meters, but I doubt if you gave a soccer hooligan an length in centimeters they’d automatically grasp what that looks like, even though the metric units should make that easier. It’s a mental barrier you have to overcome with familiarity/practice.

A football field, however, is familiar enough to most Americans to be used as a rough sketch of lengths. We use school busses too, even when not dealing with metric units. There’s just some things so visually familiar that they make good comparitors. That would be the same if the US used metric, because raw units just don’t “fit” most people’s brains in a way that lets them visualize what it really means.

I get where you’re coming from, but I don’t think this fits the vibe of the c/very well.