

You said that you don’t know for sure if it’s matter or consciousness that comes first but everything you’re saying hinges on you very firmly believing that matter is prior.
If you had genuine uncertainty about it, you would be much more careful about how you go about asking for proof. If you weren’t sure that matter is prior, it would occur to you to question what “objective” and “subjective” means. I could also ask you, can you step outside consciousness and objectively prove to me that your matter exists? If not, why do you value objective over subjective so much?
So to round back to your initial question: you can intellectually acknowledge the difficulty of proving matter vs. consciousness, yet if we probe it, clearly you hold a firm belief about it despite not being able to rationally prove your belief. So you can ask your initial question from yourself now. Despite your reasoning skill, why aren’t you more skeptical about the materialist view AND it’s implications?
They are just trying to align everything that’s being said to their previously held beliefs. People aren’t typically all that aware of what their core beliefs are because an alternative, challenging core belief would have to breach all the way into it for it them to realize they have one. Without the salient contrast, they just don’t notice it’s there. It’s just blue against a blue background, and unless a yellow comes along, they’re not going to realize there’s anything there. The materialistic worldview is so prevalent that a random online conversation isn’t likely to get through, no matter how well argued. I’ve had similar discussions many times and sooner or later people just kind of “reset” and I find myself having to say the same things again and again because there’s just this impenetrable thought loop going on. Logic doesn’t breach it, it’s just that they keep asking for all the different ways we can reach the number 42. If I tell them 41+1=42, they ask again and I have to try to explain how 40+2 is also 42, and so on ad nauseum. “Hahaa, but there’s a 33-4347+132562+767368, I bet you can’t do anything to get that to 42”. That can be done all day. If the person isn’t truly open for new ways to think (and few people in these type of settings are), as in they aren’t actively looking for it with an open curiosity, it’s not likely they’ll realize much during that convo.
It’s really, really, natural and normal. I just thought it was funny because OP is behaving the exact same way they’re asking about in their initial post. They’ll probably eventually figure it out.