I don’t know whether Glock has a design flaw or whether it works exactly as designed. I do know that whenever I read or hear about a LEO who accidently shoots himself, the weapon is almost always a Glock. In addition, I understand that pulling the trigger is SOP for Glock takedown, and that doesn’t seem like a good design feature to me.
Wheel guns generally do not have a safety other than a transfer bar, and my experience, an additional safety is not required because of the heavy trigger pull, particularly the Ruger LC101 class.
Carrying a weapon without a live round in the pipe makes the weapon about as worthless as a cell-phone in a crisis situation where mere fractions of a second can mean the difference between life and death. Racking the slide on a semi-auto adds another second to the self-defense process, and that could prove deadly.
Hardly a design flaw. The Glock manual fully explains how to eject the magazine and check the chamber before field stripping the pistol. Pulling the trigger is the final step that releases the slide. Besides, only an idiot would attempt a field strip a loaded weapon. But, I guess idiots shouldn't own guns for their own safety and those around them.