Genuinely curious if this could ever be a possibility one way or the other. Feel like it would be very popular. But it will probably never happen

You already know that's not going to happen so why ask? Casinos are not charitable organizations that give money away for free - they are businesses and their goal is to be able to profit from people gambling. When the RTP is 100% where do they get the money to cover operations? And what about the sustainability of their business? That's why there is a house edge to make the casino able to profit from the players and make their business more sustainable in the long run.
I'm sure many of us have often seen casinos offering high RTP advantages, but this is not far from a strategy or promotion that casinos do with the aim of attracting more people, my friend usually gambles by looking for games that have high RTP even though I myself don't care about this because in my opinion when we get lucky that day then by gambling on games with low RTP, victory will occur and in the future it depends on ourselves.