That is a fair point. My only counterargument would be that due to the way cities are set up, a large portion of those emissions come from commuting. The reason people commute is they have to earn money to pay bills so they can feed their kids and keep a roof over their heads.

So, asking people to drive less could mean asking them to give up their employment, which could be much more than "giving up the comforts of their lives" like the OP suggested - again, it could really put their livelihoods in jeopardy. And, without an organized cause, clear goal, a call to action, and clear communication about why their specific sacrifices are necessary, people will not take such huge risks.