It's all about quantities. Here in Germany I see people eating meat 2 to 3 times a day every day of the week. Most of it is cheap low quality processed meat.

Going 100% vegetarian isn't going to solve all problems but reducing meat consumption in general would definitely help.

They always give you the argument "bu-bu-but we evolved to be omnivores" ok buddy, but you didn't evolve to eat 500gr of meat every single day of your life either