Canopies aren't a better solution. That same FIA report stated that there wasn't anything they could do to the cars to prevent it. You may be, but a lot of people aren't.
I'm not really a fan of canopies. I'd like to see a LMP style cockpit with doors on both sides for a quick escape.
Canopies are very situational. They'll protect the driver from most smaller objects, but won't help if the car gets off it's wheels and comes to a rest on it's side or upside down. Structures to deflect debris would be safer and also allow the driver to have a quick extraction if necessary.
Jules Bianchi wouldn't have been saved if he had a canopy as the force of stopping suddenly would have still caused the severe head injury.
The FIA report states that his head striking the tractor played a big part in his brain injuries. If his head did not strike that tractor, who knows? Maybe he could have had a chance. But the report does state his head striking the tractor was a significant contributing factor to his brain injuries.
Carrying on that point, it would have possibly saved Wilson. We don't know the weight of the debris and we can only speculate Wilson's speed. Multiple reports on it have said the same thing. Canopies are a bigger potential hazard than what we have now.
And the whole point of open wheel cars is the fact of having the highest performance cars in the world racing. Always has, always will. There is no homologation needed and the racing is among the most alluring in the world. A good 75% of the technological advances have come from places like F1 and IndyCar. So why ruin the evolution makers? Because a couple of accidents that have happened for decades ruffles some liberalized feathers? Not a great start to the idea. If it's one thing IndyCar does well, it's ruin calendars and evolve rapidly. If they feel they can do something with little drawback, it will happen.
Formula 1 cars dont need to be open wheeled or open cockpit to still be the fastest racing cars. A LMP1 car can turn the same laptimes as a F1 cars with the same closed body design if the rules gave more freedom in terms of minimum weight, aerodynamics etc.
And these accidents have opened to my eyes to the unnecessary risks these drivers are taking. 15 years ago Indycar raced 250mph at Michigan when half the track had no catch fencing. 5 years ago people stood inside the pit wall at Indianapolis during the race, mere feet from 230mph cars.
Sometimes we dont realize how unsafe and insane some things are until they're done away with or result in tragedy. In the 50s the only thing between 150mph Le Mans cars and spectators was a mound of dirt. This continued until the 1955 disaster. Just a couple of years ago there were large trees behind the guard railing at Le Mans which contributed to the death of Alan Simonsen.
Looking back at all that we realize how unsafe such conditions were for drivers and spectators and we would never think of returning to them.
Race cars going 200mph is already dangerous enough. The added danger of open cockpits and openwheels is completely unnecessary.
Let's be fair, the only vehicle Bianchi would have been safe in is a tank...nothing not even an LMP1 cockpit would have helped. No vehicle could have withstood that impact and even if it did the G-forces would have still been too much.
Now, as far as debris goes, how well would an extended windscreen do (think 1980's USAC cockpit sort of but instead it's clear thick lexan coming up to the top lf the helmet)? The top is left open for the driver to shove themselves out but they're protected from debris to an extent.
All I think drivers want is the best chance to survive a crash with their life. I've seen racecar drivers survive some horrifiying things. Mika Hakkinen survived a brutal head on crash at Adelaide in 1995 with no Hans device and '95 era safety. Yes it was into tire barriers, but the speed of impact and time it took to stop seemed similiar to Bianchi's 78mph crash.
The report says the crash was unsurvivable even with a closed cockpit. However this discounts the extra trauma Bianchi suffered as a result of a open cockpit and his head striking the tractor. The fact remains that survivable or not, Bianchi's injuries would have been less severe with a closed cockpit. If he had struck the tractor at 50mph instead of 78mph, would the closed cockpit have been enough to save him? Again, these drivers deserve the best safety measures which give them the best chance to survive accidents and reduce injury severity.
But seriously that's just an one heck of an impact...oy... 
Thank you Tony. 👍 
. Keep fighting Wilson.
