More likely, they do not believe this if pressed.
We (as in many major legislators and most humans) have recognised animals to be conscious beings, deserving of certain protections. Anyone who asserts LLMs to rise to the same must be accepting of similar protections being applied to such models.
https://www.theatlantic.com/philosophy/2026/06/no-artificial...
Definitions of consciousness are not immune to economic factors. Metaphysics has always been downstream of economics. See slavery, corporate personhood, women's legal identity, child labor, moral and legal status of animals, embryos and fetuses, indigenous land rights, intellectual property, environmental entities, and data and digital identity.
Given how we treat each other - we still enslave other people - and sentient animal species I have absolutely no doubt about it. We'd find a way to justify it.
The script we use here isn't new. Its been used repeatedly throughout history. It's still used everyday in reference to animal agriculture, modern slavery, how we treat addicts, etc.