I'm all for HTTPS everywhere but right now for my products it's either: https with self-signed certificate, which basically makes any modern browser tell its user that they're in a very imminent danger of violent death should they decide to proceed, or just go with good old HTTP but then you hit all sorts of limitations, and obviously zero security.
I wish there was a way to opt into a "TOFU" https mode for these use cases (which is how browser dealt with invalid HTTPS certificates for a long time), although I realize that doing that without compromising the security of the internet at large might be tricky.
If somebody has a solution, I'm all ears. As far as I can tell the "solution" employed by many IoT vendors is simply to mandate an internet connection and have you access your own LAN devices through the cloud, which is obviously a privacy nightmare. But it's HTTPS so your browser will display a very reassuring padlock telling you all is fine!