I agree that safety equipment saves lives but the biggest life saver is between your ears. Driving the "ring" during a public session at 9/10ths is frightening and IMO - no amount of safety equipment would have saved them once they crashed on the roof.
That said - your point is well taken as US driver's ed's require:
- safety inspection
- track day inspection
- newer helmet
- recent brake fluid change / check
- convertible restrictions
Also - the ones I have been a part of had an emergency vehicle present at all times and dedicated corner workers on hand.
I would consider getting:
- fire suit (although on a hot day I think this is more dangerous then shorts/t-shirt)
- fire gloves (so you can get out)
- fire extinguisher
- Neck brace
The "ring" is a whole different animal! Very dangerous, no run off room, difficult to learn, many simultaneous vehicles at different speeds all at once, no requirements to get on the track, no dedicated flag workers at short intervals, etc. It is basically a very dangerous track and a free for all with the drivers.
I wouldn't drive much faster there then most people are comfortable driving on the street - IMO.
Still very sad and I have thought a lot about this since hearing about it. I have made my share of mistakes on the street and at the track and "but for the grace of God go I".