I would imagine it's a little more dangerous to space out and get lost in your thoughts though :)

If you’re getting lost in thoughts unrelated to operating a motorcycle you need to take a break. That’s a sign you’re about to make a mistake. I think the OP’s point is your mind gets in to a flow of watching the road, feeling the bike, observing the landscape, etc.

That was my point. The gp was taking about processing thoughts

It is, but you seek out the less traffic'd roads when on a motorcycle. (I ride too.)