Someone texting/talking drifts into my lane, an extra couple of feet could make the difference between avoidance or contact.
If I were to pass you in a safe legal manner, wouldn't it be preferable to have 8' of separation rather than 6' of separation?
When a semi negotiates a curve, the trailer tracks further in than the tractor which necessitates crowding opposing traffic and anyone on the shoulder or a bike lane.

I take my responsibility for the safety of others very seriously, just because what I do may be "legal", I rather have a greater margin for error.