I too have a maine coon. I would never let her outside. Too much invested. She doesn’t even have the desire to go out. Outside cats around here disappear or get run over...or used for target practice. We live out in the country.
That's interesting. My sister-in-law has had three and none of them ever showed interest in going outside either.
All of my not Main Coon cats loved being outside.
I keep my kitties indoors. I see strays running around and most do not last long. If I lived in a more country type environment, I would have a few outdoor kitties, but in the city, outdoors is too dangerous.