Society would have a lot fewer car accidents if we, collectively, could get over that "Oh no someone dared to get in front of me!" feeling.
So it's bad to be mad while driving, but there's a lot of lane changes that deserve the ire. (It's a tiny fraction of drivers that get really bad, but a less tiny fraction of lane changes.)
Yes, but the comment above was about society collectively making a decision, so that's the context I responded in.
And while it's relaxing to not worry about your own exact speed, I don't see how that lets you avoid stressing about the people that are lane-weaving. They're acting dangerously and I need to be ready to react to them.
And the police don't enforce this.