because most damage is institutional so most of the work has to be done by institutions (states) and corporations. you can track the carbon footprint of rich people all you want, this won't change a thing until states and corporations are forced or voluntarily do what is necessary. It is like trying to do cost optimisation in your company by slashing the department with the lowest budget while leaving the ones with big fat budgets almost untouched. Doesn't make sense, will not work. Personal responsibilisation will only make sense in a framework where states and corporations first do their fair share (see yellow vest in France).