I'm from the UK but I'll sign anyway.
The reason why you don't get many fully blown JDms are:
-High crash testing standards
-Low emmissions
-The Government wants you to drive SUVs or domestic cars so that their local industry/economy prospers, as said.
If you ask me I think you should send this petition to DoT. Also, I think the Government is playing Big Brother on your lil asses
and forcing you to do things.