You’re not capturing any of the traditional photography market by throwing all of _their_ priorities straight out the window.
So the market for the device under discussion here would be the people who want to spend a substantial amount of money on a dedicated device that is essentially equivalent to their cell phone except bulkier and without the ability to send and receive texts and phone calls.
Camera makers are struggling because a substantial portion of the market doesn’t really care about photography, they care about capturing memories. You’re proposing to make a device that’s mediocre at all the things traditionally important in photography and mediocre at capturing memories (a separate dedicated device will never be as close at hand as the phone in your pocket that you take everywhere).
I really don’t see a big market for this.