Back to the basics...
If you got the money and your happy with the power then why not spend some time making it look good? My darts got rusty panels and a stock looking motor with the exception of aluminum heads but I can understand these guys wanting to make their stuff look good. I could care less for it in a 10 second car though.
If I had a door car running in the 8s or faster I would want it to look damn good. Also I think dragsters should always make their engines look clean. I'm not a huge fan of the chromed out big blocks on dragsters but the guys running greasy old nasty parts on a dragster just aren't as appealing for me.