Most of a second drivetrain, system to make them work together, a bunch of batteries and the associated weight makes a lot of sense in a harsh environment, not to mention the increased cost for something that will get the crap beaten out of it.

There's a reason oil field trucks tend to be the most minimal trim available. More stuff -> more stuff to break -> more complicated service -> waste of money. Automatic windows are a convenient but hard to justify when they cost more up front and cause more downtime over the life of the vehicle. Ditto for most other luxury features.

You know what sucks, having a Prius that won't use its electric powertrain because the software is trying to protect the integrated A/C compressor from damage because a rock kicked up by another vehicle was the straw that broke the camels back and causes the condenser to leak out refrigerant. Now imagine not being able to use half the powertrain of a pickup you're trying to do work in. See the problem? Sure you could do a different A/c system but you're probably giving up some other important performance metric (like fuel economy) or you could let it ruin the compressor (but then the customer will complain or you'll waste money replacing compressors under warranty)

GMC made a hybrid pickup. It was cool because it could be used as a power source to run tools at a jobsite. It didn't sell. They canned it.