Charlie took too many risks, for example using double yellows for marshals-on-track which is dangerous and unacceptable.
No. Whenever marshals need to go on track, the VSC or SC should be used, whenever many cars need to be recovered or barriers need to be repaired, then the reg flag needs to be used.
It is the sensible approach as used in Australian racing, where Masi is from. Whiting took WAY too many risks. It is was reckless and dangerous.
In Australia, we have been always using safety cars wherever necessary for a very long time, e.g., EVERY time there is a car stopped on track and marshals need to go out to wheel it back, the safety car must be used without exception. The old F1 approach of trying to avoid safety cars and use double-yellows instead despite marshals being on track is both dangerous and wrong.