It's entirely subjective. I'm neutral about running outside, but I enjoy running on a treadmill because I can get into a kind of zen mode or watch something. Similarly, I love weight lifting because the experience of hard muscular exertion is intensely satisfying for me, and the overall lifting session gets me in a similarly zen mode.
> When you run, you get outside, you go somewhere, you see and feel different things.
I disagree. When I run outside, I see the same thing every time. Maybe if I lived in a wide open meadow or forest where I could take infinite paths it would be different, but in a suburb/city, it's just buildings and streets. Not that interesting to me.
> There's a race ecosystem that encourages you to get in when you can barely run a mile without stopping and allows you to push yourself as much as you want
I hate group sports. I don't want to see other people at all when I'm exercising, so this 'race ecosystem' has no value to me.
> if you pick the right spots it's safer.
I don't really understand your point here. Are you saying running is inherently safer than weight lifting? I would need to see some evidence. Safer than strongman or powerlifting, maybe. Safer than light-moderate lifting with proper form? I'd be skeptical of that claim.
> But the gym is the same sights, smells, and sounds over and over again
Again, I feel the same way about running outdoors. For me the differences from you seem to be (1) I don't need novelty, I exercise for the health and physical sensation of exercising itself. If I want novelty or new sights I'll watch a movie or take a trip somewhere. (2) I love the sensation of lifting itself, just like I also enjoy the sensation of running or biking.
Maybe find a way to focus on the exercise, not the environment. Or just watch videos or listen to music. There's no way around it, weight lifting is inherently repetitive