Trying to argue that the amount of demolitions needed to destroy the twin towers would have taken to long to plant and rig is a logical stalemate.
...
Forgive me if this has been mentioned already, as I haven't had time to read the entire thread. But I've thought about this before (as has everyone else who read your post, incidentally), and I think you've got your conundrum somewhat backwards:
Planes and explosives are at opposite ends of the number line, so to speak.
That is to say, as you started out saying, the more capable you believe a plane was of inflicting catastrophic damage to the WTC buildings etc, the less you need explosives to explain the subsequent collapse of the towers. The more you need to include explosives into the scenario, the less you accept the destructive power of said large aircraft slamming into said buildings at several hundred miles per hour. This also applies to the far extreme of the "video fakery" conspiracy theorists, who believe that no planes hit the buildings at all, and that they came down solely due to explosives or some unseen explosive device.
Trying to stay in the middle as it sounds like you (the OP) are doing is an untenable position in its own way, because as you are able to accept the a plane would do significant damage to the buildings, the explosives become unnecessary. This is relevant because the imagined perpetrators (those who planted/activated the supposed explosives) would have been planting them for no reason- which means they would have risked being caught installing them for no reason, risked error (premature/faulty detonation) for no reason, detection etc.
So, logically, it would seem that even from the POV of a conspirator that it would be better just to, you know, just fly the planes into the buildings, as was done. Either that, or you must protest, to an increasing degree, the effect of slamming a loaded aircraft into a skyscraper at high speeds.
What do you think? Someone should make a graph, I wish I was good at that stuff...