It is bait. Human mind can adapt to anything, either it's metric or imperial, even bananas. However unlike imperial, metric is systematic and you really only need to know one rule: Multiply by 10. It's also transitive, meaning 1 liter equals to 10 dm^3. Other than this, rest of the world using metric so it's tedious to being have to convert measurements every time, from both sides.

Also scientists, gun owners and drug dealers already using metric. /j