I don't get it either.
I see both come to the track. I have the ones that buy the high-coin toys JUST so they can take it to the track. And, I have others that wouldn't dare take their *nice* toys to the track.
Either way, I wouldn't ever encourage someone to take something to the track they are afraid of. That means, afraid of hurting the bike... afraid of the bike hurting you... afraid of whatever.
If it gets your butt on the track because you can pick up a bike that costs less than the exhaust on your street bike... whatever lets you sleep at night.