[mikeg8]

Others bear the cost, only if the meat consumption supports the producers of externalities aka factory farms and CAFOs (concentrated animal feeding operations). If the meat you consume comes from small-scale, grass fed, local producers, there are no externalities (or fewer than cultured meat could produce) and thus eating meat can still be ethical.

[shlant]

"thus eating meat can still be ethical"

Most people who choose not to eat meat for the ethical reasons do so based on the foundational belief that killing another conscious animal for food is unethical. "small-scale, grass fed, local producers" do not negate that belief.