Earlier quoted context omitted.
So whats the alternative? Do nothing at all? If you have $100k left to pay on your mortgage, and somebody offers you $5k towards the mortgage are you going to tell them they're offering you a "false hope because you'd still have $95k left to pay"? EDIT: This is also known as the "nirvana fallacy": because the solution is not perfect - that means it is worthless. https://en.wikipedia.org/wiki/Nirvana_fallacy
No, the alternative is to figure out how to change the very fundamental levers of the system in a way that enables change on a scale that matters. The individual consumption lens is going to accomplish nothing. If you could move an entire country from being car dependent to being largely car free, by pushing rapid urbanisation and transit and you put 20 car drivers onto a train or a bus, then we're starting to talk a…
People are different, your idea of the best tradeoff and how to spend your carbon budget is likely to be different to mine, neither budget is more right or wrong so why not allow both.