Also part of my point is that we do not have to focus on human emission as the only lever. We can also focus on sequestration of natural emission (or sequestration of atmospheric carbon as a whole).

Telling people to not emit carbon dioxide from, say, a health related usage (sanitation) IMO is foolish when we can choose to sequester from other areas. Frankly I think we need to focus on the decarbonization of energy, rather than regulating human behavior.

For one thing, because it's important to know the lower bound of success in order to identify the reasonableness of the proposed solution, competing its perceived costs with its perceived benefits.