This question and its answers all take as truth a statement by Han Solo, that hyperspace "ain't like dusting crops".
Other scenes in A New Hope show that Solo is a bit of a blowhard, inventing impressive-sounding statistics about his ship, and that the Millennium Falcon isn't well regarded by other characters. It also occasionally needs "percussive maintenance" to behave properly.
Is there any evidence in-universe to corroborate Solo's statement that hyperspace navigation is hard, or any source (including out-of-universe like an actor interview or script direction) to indicate that Solo was lying to sound like an expert or to cover up for the hyperdrive failing to start?