A Cessna 172 is no more complicated than an economy car.
Not trying to sound snarky here, but have you ever piloted an airplane? The pre-takeoff checks take a little while, require a good bit of technical expertise, and are absolutely required if you want to be pretty damn sure that your airplane won't fall out of the sky. Safety is, at times, overemphasized, but then again your car won't fall from the sky when it stalls.
I read him as saying it's no more complicated to build; not that it's no more complicated to operate. This interpretation makes sense in view of his point that safety concerns (pre-takeoff checks) are what prevent widespread personal flight.
Well, there was this time when I was two and I was sitting on the pilot's lap....
I've spent a lot of time as a passenger in small planes and I have a good idea of what's involved in a preflight. I'm not against safety in general, but I think lawsuits and government oversight have really held back general aviation. A plane should be more reliable and therefore expensive than a car with a similar level of sophistication, but it doesn't need to cost 15 times as much.
Edit: based on khafra's comment, a possible reading of my earlier comment is that it's no more complicated to fly a plane than drive a car. I intended to say that it's no more complicated to build a single-engine propeller-driven airplane than to build a car.
People often underestimate how important regular car maintenance is for safety. Just because it statically holds on ground or casual speed doesn't mean it'll grip in a quick wet corner or handle safely in an emergency situation. Hence (partly) car death+accident rate is abysmal compared to flying vehicles. In addition to weekly maintenance checks, I personally always run quick pre+post drive checklists on my car, but then that may be because I received flight education :)
Like the parent, I had an informal "pre-flight" inspection that I'd execute on my motor home on travel days. Hatches closed and locked, hoses and cables and steps and awning retracted and secured, ceiling vents closed, LP gas shut off, tires aired up, engine fluids nominal.
172's were introduced in 1956. I'm certain if personal flight were more mainstream, flying could be quite as easy as hoping in your car. Further, it's easier to automate flight because of the vertical space available for traffic separation. The hard part is space for taking off and landing.
I personally don't agree that safety has held personal flight back. It's just not practical except for longer distances.
I actually agree with you, but I have also yet to see a relatively inexpensive autopilot system that can successfully navigate all of the many horrible scenarios that could arise. We're probably already (or nearly) there tech-wise, but in the current Cessnas, you still need to be able to land and take off, and if there's even a minor crosswind on landing, this requires a very good bit of training and understanding of the technical limitations of the airplane. Not impossible for people to learn, but certainly a lot more difficult than "gas = go, break = stop, wheel left = turn left, wheel right = turn right".
As far as safety goes...I agree that personal flight has a great track record. But it's difficult to say if this would continue (absent a beautiful autopilot system) if we gave out pilot's licenses to 90% of 17 year olds and filled the sky with millions of small aircraft.
You don't have to know how to fly an airplane by instruments alone, either, until you want to get an instrument rating.
As an example of a lower barrier to entry, the (relatively) new Sport Pilot certificate allows for the operation of smaller, lighter aircraft with training and testing requirements that are not dissimilar to those for getting a driver's license.
Not trying to sound snarky here, but have you ever piloted an airplane? The pre-takeoff checks take a little while, require a good bit of technical expertise, and are absolutely required if you want to be pretty damn sure that your airplane won't fall out of the sky. Safety is, at times, overemphasized, but then again your car won't fall from the sky when it stalls.