Two thoughts here:

1. An ideal society would be structured such that you wouldn't need to buy a truck you use as a car 90% of the time. But that society doesn't exist here, and you shouldn't feel guilty about living by incentives you didn't create. Maybe you do need a truck!

2. But we're not talking about people who compromise to make 10% of their trips more convenient; we're talking about people who never use their truck for truck things. A car would be better choice for them 100% of the time, yet they still drive a truck.

One of my points was re: #2:

I am not sure how I would answer on that survey. It really depends on fine details of how the questions were worded.

For sure towing would be "rarely". But "personal hauling"? I am not sure.