The way I see it, "from each according to their ability" is the right approach here. If you can afford 30% less flying, red meat etc, then it's your duty to do

The way I see it, "from each according to their ability" is the right approach here. If you can afford 30% less flying, red meat etc, then it's your duty to do it. You don't need to make your cat go vegan; just... do what you can, even if imperfectly. Shame is not necessary, but callous indifference is not acceptable. There is a middle ground where you treat it like a habit to improve, like a step count.