Which is to say, HTTP is not some "ancient" tech like an analog television. It is a modern technology used today doing things that HTTPS can't.
I saw once my ISP injecting javascript ads into http traffic and the horror is with me forever
Also would argue maintenance is only as complicated as you make it for yourself. Countless people keep patched, secure, https web servers running with minimal effort. If its somehow effort, introspect some on why you are somehow making so much work for yourself.
HTTP/3 already doesn't allow anything but CA TLS only. It won't be too long before they no longer allow you to click through CA TLS warnings.