After watching several HB:s having problems with Apollo trajectories I'm getting feeling that they have naive expectation for google maps style directions:
Absolutely, it's not like driving a car. A classic example of the detail involved is the Voyager 2 mission and how the 'alignment' of the planets were exploited to send Voyager 2 to the edges of the solar system. There are so many facets to setting up an orbit and I defer it to the real experts.
One of the classic fails in hoax history is the combinatorial arguments of Jarrah White and Ralph Rene and their Apollo 13 analyses.
Jarrah claimed that Apollo 13 would not have enough fuel to enter a lunar orbit so could never return to Earth. One issue with this argument, Apollo 13 did not need fuel to enter lunar orbit, it was on a free return trajectory. To paraphrase the movie: Newton was in the driving seat. They did use fuel for course correction.
Then there was Ralph's argument. He claimed that the moon would not have 'slowed' Apollo 13 down sufficiently to bring Apollo 13 back on a free return. Given that he claimed to over turn Newton's Universal Law of Gravitation, I'm not surprised he did not understand the higher level orbital mechanics involved in free return.