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.
You could just say “no.” I was curious how far your logic would go because you said, and I quote, “it would be forcing people who prefer Ben & Jerry’s to either have vegan ice cream or switch to another brand”
Like, dude, come on. You have to hear how ridiculous that sounds. Nobody is forcing anybody to eat ice cream. And also, though this is just coming from my experience, I’ve never met anyone who exclusively likes Ben & Jerry’s. Bad ice cream is almost always better than no ice cream so I would challenge you to find someone who would be upset about needing to eat ice cream that was created by any brand other than Ben & Jerry’s.