If you think that replacing a person with an object cannot be an artistic choice
Literally nobody is saying or thinking that. What we are saying is that there is absolutely no way that OP’s prompt contained “…and make the optimist BE the glass itself…”.
The irony is that you’re giving OP way more benefit of the doubt in your reading of what they produced than you’ve given me, and instead argued against a complete strawman.
The first few decades of my life I assumed that there’d been all sorts of important orthopaedic/podiatry research done into the difference between men and women’s feet, gaits etc that meant wearing sports shoes sold as “women’s” would in some way cause my feet long term harm. Nope, it was bullshit marketing all along.