How is a hot spring something that people NEED to use? You’re acting like it’s a necessity of life to go use it. It’s not. And the people using it are poor? That’s a pretty damn big generalization you’re making there to try and further your point.
They still should NOT be blocking people’s access to anything, but don’t turn this into something it’s not. The destination and their wealth aren’t what matters here. They’re pissed that there are more people around and trying to do something about it. This is a common theme with any tourism heavy area.