Elon said at a public meeting they are not interested in any race activity. He explained that those are a way to create a demand (a form of advertising) which Tesla doesn't need more of. They have more demand than they can produce.
Racing is all about being extremely wasteful with energy for the sake of going really fast on a race track that has very little to do with every day driving. I'm glad Tesla isn't wasting resources on that. There is no advantage for normal people whatsoever. Yes, you can buy a Nissan GT-R and brag it's the fastest car you can buy on the track, but let's be honest, no matter who you are, you won't be able to ever drive the car in a way where it would make a difference and your skills are no where near the limits of the car.