I sincerely hope Jules is OK and makes a full recovery. That said, he was traveling FAR TOO FAST while double yellow flags were waving. Drivers have been ignoring yellow flags for years, either barely lifting or not lifting at all for them. They constantly over drive the cars and leave the racing surface and never get a penalty.
You want to stop this sort of thing? It's simple: ENFORCE THE RULES. About time Perez gets 5 drive through penalties in a row for going off track, he'll stop driving like an idiot.