Every time you press the accelerator pedal on your car you are spewing CO2 into the atmosphere. Every time is bad.
That does not mean that we stop driving. We drive less.
That's not fundamentally ethical at scale, it's a systems problem. "Do the least damage" is the interim fix while the industry decarbonizes.
Not eating cute critters is fundamentally ethical.
These kinds of comparisons just don’t work and they come off as being an odd sort of defensive reply. Not to mention it’s a false equivalence. In the end though it’s a personal choice that really doesn’t need to be criticized, whether it is based on preference or ethical beliefs.