I don't think it should be legal, but Congress unfortunately doesn't give me a whole lot of say in what becomes law.
Your best bet is probably to just not use the app from now on. Go ahead and accept the new terms, then disenroll in however you need to. I have an LG dryer/washer pair, but never downloaded the app, didn't register the equipment, and it's not on my network but still works fine. You can't remotely trigger a wash, but you can set a delayed start from the onboard control panel, and as long as you're reasonably accurate in your prediction of when you'll be coming home, it'll have the same effect as what you're doing with a remote trigger.
Your best bet is probably to just not use the app from now on. Go ahead and accept the new terms, then disenroll in however you need to. I have an LG dryer/washer pair, but never downloaded the app, didn't register the equipment, and it's not on my network but still works fine. You can't remotely trigger a wash, but you can set a delayed start from the onboard control panel, and as long as you're reasonably accurate in your prediction of when you'll be coming home, it'll have the same effect as what you're doing with a remote trigger.