If my vehicle had the ability to change its width when I needed to, I’d agree with you, but my car does not have that option, the two bikes do, it wouldn’t take much effort for one to slide behind the other to let the vehicle behind pass, it’s a give and take with society, I’ll actively make sure to keep you safe from my vehicle, while bikes should actively try to allow larger or faster vehicles to pass safely instead of putting themselves at risk over something that takes no effort to do.