Actually Dave when I was in the field the site guys did not have routers or drill presses or anything like that on site or home, maybe a rotozip or dremel. It was the guys like me that also did woodworking as a hobby that had all that stuff. Heck most of the crew would not touch a tool after work, they considered it work and would tell me they do not do work at home.
I think we are so used to dealing with people that treat woodworking as fun, a hobby, as well as work or some, that we forget many, many carpenters just think if it as a job and that's it. I think that is who this is designed for.
To a carpenter(not a woodworker) that does the occasional cabinet fix and side job, the Jessem may make sense.