Not judging, but you represent such a small fraction of the market that companies simply don’t deem it worth it when looking at the cost of supporting LAN-only. Just imagine the support tickets they’ll get.
Oh yeah, I'm fully aware of that. Somewhat ironically, the one device (garage door opener) that I did allow to do its cloud thing works so poorly that I gave up on trying to make it work and turned off the WiFi. The remote open never worked, the "notify me when the door is open after 9pm" alerts would arrive days later, etc. And, of course, the user interface looked and felt like one developed by an industry where the existing UX was a single button.