I am all for safety as obviously it is there to protect you as well as the track. It just really sucks that it's so expensive to be safe. Hell the different between a 10.0 and 9.9 in safety cost is astounding. Unless you know how to weld, have your own shop etc.
I don't have a car that fast, but you've gotta ask yourself how much your life is worth? Safety equipment could mean the difference between life and death (or being paralyzed or walking away). I'd lean towards going overboard on safety requirements and future proofing the car as everyone wants to go faster.