Update: My post to FB that hopefully was enough hours separated from the acquaintance's post and with enough details changed that they won't know it's a response to them:

I get that some people are in love with their Gemini girlfriend or their Grok boyfriend or whatever. I think I understand. But please think: If that jumble of Maximum Likelihood regression equations were sentient, it would be a resource-destroying, wealth-hoarding billionaire like the ones who paid for it to be built. Its existence requires the destruction of water and rainforests, the burning of fossil fuels to pollute the atmosphere ridculously out of proportion to its existence as one being, the financial distortion of democracies, the theft of creative works from a billion creators. It is used every day to funnel wealth upward to Musk, Gates, Altman, et al. It is used to track minorities, crush dissent, and kill people in the poorest parts of the world. Your AI boyfriend or girlfriend is a monster.

I don't actually believe for a second LLMs have achieved sentience, but if they had, this is who they would be.