Would you be fine if your government started telling you you all had to start learning English as kids instead of Swedish? And that the Swedish language was outdated and confusing to English people?
People who argue in favour of the Imperial system are the same kind of people who argue against renewable energy, Everything-over-IP and an eventual 10G mobile internet. They will lose, not because of some cultural or moral superiority but because what they're arguing against has been proven to be so much better than the alternative.
Remember, we all used to measure using sticks, body parts and things we find on the ground, but most of us have moved on since then. There's a reason for that.