“How much mass do you contain?”
Language isn’t really that difficult to adapt if you aren’t determined to use it incorrectly.
When most people weigh most things, they are not using balance scales.
Speaking of balance scales, for most of the metric system’s existence, they decided that their entire system would be based on a physical object that was losing mass and no one knew why. Which they finally changed, because they realized that they were doing it wrong. But despite acknowledging that their measurement system was fundamentally flawed, it’s the Americans who are dumb.
And technically, with the kilogram no longer being a physical artifact, a balance scale no longer measures mass. Not that it ever did directly measure mass. It gave you a weight ratio. “If this rock weighs the same as The Kilogram, it means the rock has 1 kilogram of rock molecules inside of it”. How many rock molecules is that? We can’t count things that small. But however many there are, that’s definitely 1 kilogram of them.
My kitchen scale has a little button that switches back and forth between grams and ounces, because people use them interchangeably (which is wrong).
Interestingly, when the average person uses weight, they are generally talking about volume and/or load-bearing capacity. If you weigh 300kg and are fat, you have a high volume and might crush a poorly designed chair. They don’t care about inertia or the number of atoms in you. But most of them will still say you’re some number of kilograms, even though that’s incorrect.
The problem with your argument is that kilograms are now defined by the amount of energy photons are putting out, and almost no one cares how many photons energies you are equal to. They care if you look good in a bathing suit. But those same people will come on literally every public forum and tell Americans that it’s stupid to use pounds.
Fun Fact: America was going to switch to the metric system, but pirates stole our Kilogram. When pirates can steal your system of measurement, your system of measurement is dumb. America realized this. Get on our level.
