In a way yes, your whole reality is your own internal hallucination, and there is no way to break out of it

That doesn’t mean you can’t explore anything within that

In fact a lot of eastern philosophical and religious traditions focus exactly on that, how exploring your inner self is a valid and very good way of discovering reality

Not sure why you fixate on “nothing to discuss” or “conversation ending”

Neither the ideas above nor solipsism are dead ends, there’s plenty of exploration to be had within those

Now if you don’t like them or want to dismiss them, you are free to do so, that’s your own personal take, but that’s not an objective absolute truth