Unfortunately it's an easy sentiment to promulgate. It taps into feelings of fairness and justice. Those are some very foundational emotional drivers for humans

However, I think there's a chance to turn that sort of reasoning around. Like if we appeal to the idea of right and wrong. If using fossil fuels is like stealing or assault or worse, then the fact that someone else is doing it doesn't suddenly make it ok. It makes the person doing it a bad person.

The problem with fossil fuel use currently is that so many people are using them and whole countries and ways of life have been built around using them. Getting rid of fossil fuels has the potential to be as disruptive as getting rid of slavery.