Perhaps you will let me expound some basic mechanics here. In all of this, the coefficient of friction is king. The key to all this must be friction, and the ability of the Egyptians to reduce it. I suspect that they were much better at it than we realise. First, they must have wherever possible, pulled objects along the ground, using a flat interface.
Sledges reduce the contact area and dramatically increase friction.
Thus only carved objects would have been born on sledges. Second, they probably developed very effective lubricants. River mud is a very good lubricant, and Nile mud is apparently extra slimy. Thus they had ample supplies of a cheap and effective lubricant. In the absence of mud or as a supplement to, tubular roots, such as potatoes, are also extremely effective.