Yes, agreed a pyramid is a basic shape... so the fact they are found all over isn't that suprising to me... what is suprising is the Orion orientation connection that many seem to have.... there is a reason for this, its not mere coincidence.
In the days before steel and cranes, if you wanted to build a stone building that was high, the only way to do it was in steps with various levels built on top of each other.
There is nothing particularly strange about seeing pyramidal structures all over the world. This is the only way to build a building that is over 30 feet high when you just have stone.