As far as I can tell this conclusion is at the heart of many of the maters debated on this forum.   However I think there are massive issues with this idea. 1. Lack of Evidence First consider the fact that the people making this claim are only experiencing their own experience. So anything that exists beyond their experience they are by definition not experiencing. So isn't the person making a claim about something they don't know about? After all if something else did exist they would have no experience of it.   2. The limitations of the experience Human experiences (at least mine) are aparently too limited to bring themselves into existence. Thoughts, sounds, colors, and sensations all lack the apparently neccessary brain invovled in generating experiences. There is lots of evidence a brain is involved. For example, when people's occipital lobe is damaged they no longer see (https://www.ncbi.nlm.nih.gov/books/NBK560626/#:~:text=Cortical blindness is an important,proper management and improved outcome.) This is an indication that the source of human experiences exists beyond the experiences.   3. Other people's claims about their own experience People claim they have a different experience than me. And I can tell you about my experience of typing this right now and seeing that it's 5:41 PM and you can know that your expereince is different than the one I'm describing.   For these reasons it seems appropriate to infer that something exists beyond the limited experience. More importantly though there is apparently no reason I'm aware of to conclude (and spread the idea) that nothing exists beyond the experience.