Trying something new: America AMA! 

Ask me a question why something is the way it is in the US and I'll try to give you the best answer.

Qualifications: I've been an American my entire life. Other Americans should feel free to chime in.

Why don’t you give up the imperial system?

1. Distance is better in metric but temperature is better in imperial.

2. Americans don't like being told what to do more than most cultures.

What are you basing #2 on? I can think of many other cultures who are  far less amenable.