While I appreciate open carry as a way of reassuring the public that there are armed citizens about; tactically, concealed carry is far more practical.
Open carry sends a message to everyone. Concealed carry sends a message just to criminals, and one they cannot see coming. A message that even dimwits can get.
Finally, something I harp on, if you carry a concealed carry handgun, you should definitely carry a quick draw sheath knife, as the two are very complementary for self defense.
It’s all good, and the more, the merrier.
You can't practically carry an AR15 concealed. If that is the weapon you need, then it must be open carried.
Further, your statement doesn't consider the tactical advantage to YOU when others carry openly.
Unless you are trying to draw someone in to attack you, making yourself look weaker than you are has no tactical advantage.
If you look like food, don’t be surprised when something tries to eat you.