If somebody is looking to take personal action, sure go right ahead!
But for systematic change, and systematic change is what's needed, there are sever political consequences for focusing on hugely unpopular actions that have little effect. Attacks on meat have empowered those who oppose climate action, which is just below 50% of the population in the US. Focusing climate action on meat consumption has been counterproductive, just as doomerism about climate action is used to make people feel helpless and then abandon taking any action at all.
We have very little time to make massive climate strides, and anything that slows down the fastest action in the US, like prioritizing meat consumption and not placing it in the proper context, causes great harm to the cause. Just as focusing of food miles by hapless media has caused great harm for climate action.