In general, handguns with active safety levers are considered less-safe than firearms without active safeties when being carried in proper holsters (ones where the trigger area is completely covered) because of the additional steps required to use the firearm when it is deployed. Having a pistol come out of the holster ready-to-fire is always going to be advantageous to having to remember to manipulate the safety lever, ensure the firearm is loaded, ensure the firearm is in-battery, etc. when the time comes.