Considering that the Dragon Capsule uses a different upper stage with different rocket motors (Dracos instead of Merlins), this seems like a stretch to ground the whole Falcon 9 vehicle line. See
https://en.wikipedia.org/wiki/SpaceX_rocket_engines for the current line of SpaceX rocket motors.
The FAA was asked to find that the RUD of the Merlin in the second stage of that launch did not "endanger public safety", but has not done so, so far.
I think that it should be required for the FAA to determine that it
does endanger public safety before grounding a vehicle. I am not aware of any showing by the agency or anybody else that the failure that occurred had any significant potential public safety impacts.
Contrasting this to the FAA not grounding the Boeing 737 Max until after its
second crash that killed hundreds of people, there seems to be some bias in the agency's treatment of the different companies I am wondering if this has anything to do with "saving" the Boeing Starliner program.
For its own credibility, the FAA needs to make a rational explanation of its positions.