Yes, it's a social signifier, in multiple ways. But none of them good.

Some people don't eat tofu because "that's foreign food"

Some men don't eat tofu because "soybeans make you produce estrogen" and they're afraid of... having estrogen, IG?

Some people don't eat tofu because "humans are meant to eat animals, it says so in the Bible"

Not eating tofu is one thing. Refusing to eat it ever is sus as hells.