The consumption of animal products isn't the problem. It is the exploitation of the production for profits
Greenhouse gases aren't created through exploitation, but by the pure existence of the animals. Even if we hypothetically held all animals under perfect conditions (which is impossible anyhow due to lack of land and ressources), it doesn't significantly reduce the greenhouse gases. If you want to lower the emmissions, people must lower and ideally stop the consumption.
You can point fingers at people who want to eat meat
I don't fingerpoint at omnivores. I fingerpoint at people who claim that people consuming animal products is only the fault of some third party rich people. We know that veganism helps the planet in many aspects. If you decide to live different that's OK, but it's your choice.
if you can afford to live like that.
Unless you're a Mongolian shepard in an area where soil and weather allow nothing but grass and goats or you live off food donations only, that's not true. For people who buy their food in supermarkets, veganism isn't more expensive than an omnivore diet. If you live off basic ingredients rather than comfort food, it's usually rather cheaper.