> is that if we don't know if something has qualia (despite externally showing evidence of it), morally you should default to treating it like it does.

This is how people end up worshipping rocks & thunderstorms.

> if we don't know if something has qualia (despite externally showing evidence of it), morally you should default to treating it like it does

This would be like treating characters in a book as if they have real feelings just because they have text on the page that suggests they do.

Well, what you're describing is a system of ethics, which has little to do with morality. Morality involves my own personal understanding of "right" vs "wrong". Ethics are rules of conduct prescribed by societies, such as "treat everything like it is alive".

We don't have precise definitions for (artificial) intelligence, subjective consciousness, or even life. But that doesn't mean we can't still talk about what may be possible within various levels of complexity. In order to convince me a system has a comparable experience to my own, you would need to describe to me the complex, structured internal communication occurring in said system, and present a theory as to how it could support the kind of emotion and qualia that I experience in my daily life.

Your argument could apply to plants. I already do not eat meat... if I stare at a timelapse of a plant it seems quite alive, but I'll starve if I don't eat something. Yet, my mom thinks plants "dream" in the way we do. She thinks that if I tell a plant, "I love you," every day, my good vibes will make it grow stronger and larger. I can't explain to her that intelligence comes in different magnitudes of complexity and that plants cannot understand the English language. That telepathy between humans and plants is as pseudo-scientific as it gets. I can't explain any of this stuff because she lacks a deep understanding of philosophy, physics and neurochemistry. Especially when she earnestly thinks white Jesus is running around phasing between dimensions as an ambassador for all planets in our "quadrant", or that the entire universe is actually just the plot line of Andy Weir's "The Egg".

Similarly, while I can have a high-level discussion about this stuff with people who don't, it's quite difficult to have a low-level discussion wherein the nature and definition of things come into play. There are too many gaps in knowledge where ignorance can take root. Too many people work backwards from an outcome they would like to see, and justify it with things that sound right but are either misunderstood or aren't rooted in the scientific process. I am definitely not comparing your open-minded, well-intended, cautionary approach to my mother's, but just using an extreme to illustrate why so much of these discussions must be underpinned by a wealth of contemplation and observation.