People are so weird about it, accelerating doesn't mean you aren't prepared to stop, every single driver on the track was accelerating at multiple points throughout the lap.
Second it was raining and getting worse, thus the track conditions change every lap, till you hit that part of the track you don't actually know what a safe speed is. It is F1 regulations that mean going any slower than necessary is punished significantly. If you drop 3 seconds you don't need to then the guy behind you gains or the guy ahead you were trying to catch up gets away, these things lead to your drive being taken away from you.
An actual speed limit implemented by the control room based on their intricate knowledge of the track under different conditions could easily have saved his life. Every other driver went through the same corner as fast as they could rather than the rules dictating like virtual safety car, a slow enough time that no car has ANY reason at all to speed through any corner of the track. A virtual safety car has been feasible and implementable with existing technology for donkeys years, others racing series had them. They also had a real safety car with a similar but not identical effect. It still doesn't dictate a 'closing' speed to get into a queue which means you could still do the same speed however as a driver is joining a queue they are less inclined to take risk as they have less to lose. Though pitstops come into play, if speeding around and gaining 3 seconds means coming out of the pits ahead of someone who cruised in, unfortunately there is still gains to be made.
These are things Charlie and everyone else knew about at the time, the conditions were getting worse, the drivers would be going as fast as they could get away with, that is one of the most troubling corners in the rain with a statistically significantly higher chance of someone else going off at that corner..... they sent out a recovery vehicle that would be ludicrously dangerous for anyone else that went off at that corner.
if Jules went off and the recovery vehicle hadn't been deployed he'd most likely be alive, still a bad crash but wouldn't have smashed his head against a solid concrete block. If they had deployed a virtual safety car, he WOULD be alive, if they had speed limits implemented for specifically dangerous corners under double yellows, he'd likely be alive, etc, etc.
There were loads of ways that corner could have been made safe under those conditions. Instead the FIA continued with an incredibly dangerous method of double waved yellows in which EVERY driver in the history of F1 went as fast as they could get away with. They had decades to fix that attitude/mentality and did nothing. The decision to send out a recovery vehicle in changing conditions before knowing if the corner would get worse is criminal, whoever made that specific decision, Charlie, someone else in the room or a marshal at the location should be held accountable.