I have a Commercial Pilots License and a CDL. I work Summers as a Float Plane Pilot in Alaska and I drive a truck in the off-season. I started flying a little over 10 years ago and I just got my CDL this year, so I've been flying a lot longer than I've been driving a truck.
Most people can start, shift, steer a course and then bring a truck to a stop with 10-15 minutes of in cab instruction. Nobody is going to start, taxi, take-off, manage prop and RPM controls, fly a course and then land an airplane with an instructor just telling them what to do.
Imagine a person inexperienced in either a tractor trailer or a single engine airplane that is magically transported into the operators seat and is tasked with coming to a stop. Which one is most likely to have a successful outcome? The vast majority could bring the truck to a stop but I'd suggest that very few would survive bringing that airplane down successfully.
When I'm in doubt or unsure of something in my truck I can slow down or even stop to look or think it over. If I do the same thing in my plane I will spin into the ground and die. In the lowest and slowest of airplanes decisions have to be made at or above 50 MPH and most planes will fall out of the sky at speeds a lot higher than that.
There are similarities that other posters already noted and I certainly thought of them also, during my CDL training. The only thing that I can think of that is more difficult in trucking is logging, and that is only because the DOT micromanages drivers and the FAA doesn't.
Partner, if you mastered ILS approaches to minimums with two hours in an airplane I think you should contact NASA, because my guess is that they'll want to study you. You ought to be a test pilot or flying a rocket ship or something, but you obviously got something special. I'm a working pilot with Commercial Land and Sea Ratings and Instrument privileges and I don't consider that I've "mastered" approaches to minimums.