I think it depends on the self-awareness of the user. It's easy to slip into the mode of conflating an LLM with a conscious being, but with enough metacognition one can keep them separate. Then, in the same way that walking on concrete doesn't make me more willing to walk on a living creature, neither does my way of speaking to an LLM bleed into human interactions.

That said, I often still enjoy practicing kindness with LLMs, especially when I get frustrated with them.