True, but take it from the perspective of someone who must travel 45-60 miles to the airport, arrive early enough to have time to find parking and deal with the security check points, but wind up with an hour or more dead time waiting for the boarding call, 30 minutes sitting in your seat after boarding while the rest of the cattle figure out that there overstuffed roll-on (that the gate agent or the FA should have stopped in the first place) won't fit in the overhead, flight time, walk 2 miles from gate to rental car counter, and them drive 45-60 minutes to your destination.
Even a C172 can get its pilot there in advace of the commercial passenger.
A good illustration might be a Top Gear style race from the same house to the same hotel bar, showing all the trials, troubles for the one flying commercial, and contrasted with the interesting fun for the GA pilot. Keep it honest with both having synchronized stop watches. But the aim is to show the GA pilot already enjoying his 2nd or 3rd beverage before his buddy finally trudges up with his luggage.
GA vs Commercial may never make financial sense to many. But the point is to sell the utility. Leave when you want from the runway very close to you, then arrive at the runway that is very close to your final destination.