If you're a loner, or someone who is used to little interaction or interactions only happening through texting, email, etc. LLMs are tempting in that they don't take much more effort to say stuff to than modes of communication you're already used to, with immediate feedback that give you a little rush at first, but wears off.
I've tried a few times. All it does is agree with you and spit the same turns of phrase, the same formats, etc. right back at you. it's a mimicry of a perfect echo chamber that will repeat itself and never tell you to stop talking to it.
But when you close the app, you're alone with your thoughts. That is a scary, scary thing for people.