A. Ben & Jerry’s moving to exclusively vegan ice cream is in no way forcing people to live their lives a certain way. Recipes are not protected by copyright law so anyone can make and sell ice cream however they want.
B. The dairy industry wreaks havoc on the planet. It would benefit everyone if the dairy industry disappeared or at least shrank
It would be forcing people who prefer Ben & Jerry’s to either have vegan ice cream (which may not be their preference) or switch to another brand (which also may not be their preference). What you’re saying is that you want people to have fewer options.
Would it be accurate to rephrase your argument like this?
“Ben & Jerry’s changing all their recipes to use only vegan ingredients would be anti-freedom”
If you want to make an argument against that, you can do that in your head. You seem to be good at making up things you want other people to say, so you don’t need me for your imaginary argument.