The difference between a balloon gong from glasgow to london and a pilot flying to same route is that one ended up there and the other wanted to go there.
Sure, assuming that 'want'/desire is entirely immaterial and not born out of the pilot's psychology. That, of course, is not the case, as the 'want' to go there is born out of the pilot's mental state which is the product of biology, chemistry, etc... The crash course vid I linked earlier lays out how these wants and desires, from wanting to fly to London to choosing a particular brand of car over another is the product of various things coming together... things outside of our control... You didn't pick your brain, your parents, your environment growing up, etc... The numerous variables that went into causing the balloon to drift towards London are analogous to the various factors that had an impact on the pilot's psychology, whether that be his own neurology, hormones, genetics, past experiences... 'whatever' that led him down a path in life that would allow him to go to London...
Ultimately, no one can choose what they are going to think of next. There is no freedom involved. I'd be impressed if anyone woke up with a mental itinerary of what their thoughts would be later on and have the ability to adjust it as they saw fit... Being that you can not predict what you are going to think of next or have any control over what pops into your head, it only makes sense for the actions taken under the various assumptions, beliefs, and thoughts you had during the day to be not of your own choosing as well.
idk if anyone would say bugs have free will. Do mice have free will? Fish? Where do you draw the line? We're all products of biology, idk what would make humans so special to have freedom of will when everything else in the universe is bound by its laws and deterministic nature...