Vegans love to conflate all meat into one big group because their goal is to make veganism look good in comparison.

In reality, beef is the main problem.

It would be a lot more environmentally effective to convince people to reduce beef consumption and replace it with chicken/pork instead, but vegans aren't interested in that because for them it's not really about the climate - it's about reducing animal suffering and death.

This duplicity muddies the waters and makes getting real actual change that would benefit the climate harder to achieve and less likely to happen.