> pass on the right lane

Unless there is someone in that lane going the same speed, or slightly slower, which is very common in a two-lane road near where I live.

There are also people who drive rather dangerously out of frustration when they cannot pass, making the entire situation more dangerous. The problem is that the slow drivers have been taught that "driving slow = correct", and that everyone around them must be doing it wrong.

If we put half of the focus we do with speed to things like this, our roads would be much better for it.

You have a naive understanding of human behavior. This would make the motorcyclist a target of rage by some subset of camping drivers. The camping driver may decide to intentionally inhibit traffic by pacing a large truck.

What I am saying is that when two cars are side-by-side going very near the same speed, they both feel vindicated by the fact that they are driving relatively slow, because there is a propaganda-fueled culture that focuses on speed.

They do not feel like they should do something, like drive faster or slower to allow traffic to flow around them.

This causes much more dangerous traffic situations, because traffic gets bottled up, and there are always a few cars that want to go significantly faster, and aren't afraid to drive more dangerously out of frustration.

Those drivers who drive more dangerously are seen by the slow drivers in the front to be the real problem. The drivers in the front then feel more vindicated in their "correct" driving style.