If the government was spending millions of dollars on ad campaigns to try to get people to use their faucet less, but they were not dealing with wasteful farmers, you may have an argument. But to say that people _shouldn't_ conserve resources just because they aren't the largest consumer of the given resource is ridiculous. Me being conscientious of how much water I waste from my faucet doesn't slow progress in dealing with the larger water wasters. There is no reason not to do it.
> fixing of most problems that should be tackled on the biggest contributing factors first, always
This only applies if you can only fix one factor at a time. That is never the case in real world, complex, societal issues. Society is not a computer science puzzle.
I mean.. that doesn't seem very far off from the truth?