I interpreted OPs sentiment to be an example of consumerism. Individually, sure, “some degree” could be considered meaningless, but collectively, the sentiment drives supply and production decisions, so no, I don’t think it’s a spurious or meaningless assertion to make.

His point was very clearly about each individual and not cooperative behavior. And I deny that "each individual" doesn't care unless "to some degree" is used to support degrees so small they are approximately nonexistant

I have never seen appealing to personal responsibility drive change at a large scale. Like all creatures, humans are driven by a balance of incentives and disincentives. If you want to drive change, systemically alter the balance. I think the approach of the policy discussed in TFA is aligned with this view.

I’m not sure exactly where we our disagreement lies, but I think it’s a mistake to dismiss small degrees of sentiment as those small degrees manifest as purchase decisions, which collectively manifest as multimillion dollar industries that are supported by those individual actions. Additionally, asserting that someone either cares or doesn’t care and that there’s not some continuum is a false dichotomy.

I agree that systemic changes are important. However, I disagree that personal responsibility cannot drive sufficient behavior. Look at individuals recycling.

But we're talking about this line of discussion. Which was sparked by someday saying they didn't care and no one did. I objected to the latter part of that. It's bullshit that no one cares. There are ethical vegans and people who do all kinds of things because of personal responsibility.