if you’re this concerned about the privacy of your doorbell camera then make your own solution with a raspberry pi. then you’re in full control of the device and data.
anything else can be updated to send video elsewhere, promise privacy features it doesn’t have, be bought out and shareholders demand data mining, or be hacked.
perhaps since we’re in a privacy focused community, you can share your views on what these “relatively minor” privacy spectres are, and how you would mitigate them?