Blocked from Diablo 4

I’m starting to get really tired of being left out in the cold by companies requiring a constant internet connection to play their games. I live in rural america and I, like 42 million others, can’t get access to a high-speed internet connection. The infrastructure for it is just not in place. I can’t even get DISH internet out here.
Why is a constant connection required for anything but multi-player? I don’t need Sanctuary to be “populated with other players” to enjoy it. I’d actually prefer NOT being forced to interact with others. Why am I, yet again, getting screwed out of playing a series I love?