If there aren't a lot of trucks around, then going 55 in the right lane has less of an impact on other drivers. But if there are many trucks (which there usually are, IME), then going 10 MPH under the limit will cause a lot of headaches for all the other drivers around you.
That’s 20-25mph faster than you. At that point you’re practically impeding traffic, and having a big truck pass you is terrifying.
Just because you can legally drive 55 or maybe even less doesn’t make it safe.
Generally, you actually can't legally drive that much slower than prevailing speed.
Why do people need to drive fast? The gains are minimal even if you stay exclusively on a lightly-trafficked freeway. In more realistic scenarios, the gains are almost nothing. You'll just be the first one to the light or traffic jam.
Tell me when highways, bridges, and streets are not paid by gas taxes -- you won't.
Tell me when I can trade money for reliably sequestered CO2 -- you can't.
edit: I didn't downvote them btw
We’ve decided collectively how to fund infrastructure and engage in climate action as a society. If you don’t like it, feel free to lobby your neighbors and representatives to change the law.