I don't think there's anything inherently 'great' about the Imperial system; it's just what we were raised on and, thus, how we're used to measuring things. It's a pretty easy system to translate physically, too.
I know I can easily lift a pound, not a thousand pounds though.
But I can easily lift a gram and a kilogram; so what's the point?
I agree, it's just a system of measurements. Any organization where measurements matter probably already uses SI conventions and then who really cares if we measure a road trip in miles or km?
Everyone who has to translate between the two systems cares, which includes pretty much everyone who makes the products the rest of you use and depend on. It is a pain in the freaking ass for us, and ends up presenting a potential safety hazard if we proceed with less than our usual care.
Case in point, a recent 125 million dollar orbiter failed simply and solely because Lockheed Martin standardized components in imperial rather than SI units. NASA should have caught the issue prior to launch, but mishaps like this are a hazard every time a company is forced to work with both systems.
Also, senordesol, kilogram is the standard starting unit for most day to day use. Its about 2.2 pounds. Try using that for your standard of comparison rather than a gram.
Of course, it technically is a unit for mass, not weight, comparing it to the English equivalent of slugs would be more accurate, but almost nobody, even Americans, seem to know what the hell a slug is anyways, and going the other way, people don't seem to like using newtons for weight.