Why Aren’t Guns Allowed in Airplanes ?

Actually they are.

For anyone that can posses one

TSA:
You may transport unloaded firearms in a locked hard-sided container as checked baggage only. Declare the firearm and/or ammunition to the airline when checking your bag at the ticket counter. The container must completely secure the firearm from being accessed. Locked cases that can be easily opened are not permitted.

Read what I posted.  It says UNLOADED firearms.....

You aren't making a profound point. There are lots of airplane specific rules that differ from everyday rules. I can walk around town with a knife but can't carry it onto a plane. I can walk around town with a liter water bottle, but can't carry it on a plane.....

What makes planes different from, say schools or night clubs or Wal Mart?

Or schools? You know, those schools filled with jet fuel cruising at 30000 feet

Sure. Conceal Carry

I think there should be weapons at all child births. AR-15s, glocks and swords. And if dat bitch complains about the pains cut her.

Hiya sweetie!