Question for 9/11 'truthers'...?

The conspiracy is that the gov't came up with the conspiracy. If people think that out gov't doesn't have the capability of being able to crash 2 planes into the WTC building at the same time detonating explosives for a controlled demolition, shooting missles at the pentagon, shooting down another plane over PA, hiding/executing all the remaining pengers, and making it look like muslim extremists, then what is the point of doing what they tell you to do?