teh, I think the disconnect is more universal than that. I think it it more like valuing the difficult tasks you know well (e.g. programming) and devaluing the tasks whose difficulty you don't understand as deeply (e.g. technical writing).
We see this all the time with artists in various media who want their works photographed. They will often use a digicam and take the image themselves, right? They value their own work but won't pay for someone else's skill. Pet peeve of mine.
I imagine many software/hardware groups are like that. We did the hard thing. Now who's got a spare five minutes to write the manual?