Regarding the proposed tactical adavantage of a safety buying you time in a disarm scenario...

If a civilian is engaged in a close-quarter struggle and has accessed the gun from concealment, the safety would be(or should be) disengaged, otherwise why is the gun even out. Therefore, in the event of an actual disarm, the manual safety is irrelevant since it is off.

LEO's open carry and must arrest and physically engage and restrain suspects, so they must be concerned with disarm attempts with the gun still in the holster which isn't really relevant to the armed civilian carrying concealed trying to avoid trouble.