The problem with what you're saying is that you're assuming there was any concrete at the point of impact. If the concrete and steel was removed prior to the plane's impact, it would fly right into the building.

We do see planes fly into the building. However the only part of the wall that was visible from the videos was the outermost aluminum layer. We don't know if the concrete and steel layers were still in place. Since the planes did fly into the building for the most part, it is safe to assume the concrete and steel layers were no longer there. That's certainly more likely than super advanced hologram technology instead of planes that fooled everyone who saw it in person and all the different kinds of video cameras that recorded them.

If you also study the videos closely at certain angles, you'll also see it looks like some internal explosion went off moments prior to both planes hitting. Perhaps that's when the concrete and steel layer of the wall was blown inward, and the plane impact covered it up. All that's required was preset charges ready to go at the right place at the right time, which they used on the entire building.