Sure, but uncle (who drove a truck for a job) sat down with the manual for several hours one night and figured it out. He was probably the only person in the entire town he lived in. Most people could have as well - but it would mean spending several hours of study and most people won't do that unless forced (and rarely even then - see all the tropes about homework...)

I mean that's exaggerating. I did it, it took maybe 10 minutes following the examples in the manual. It was not very intuitive though, so if it wasn't something you set up often you'd always have to go back and read the instructions again the next time.