You've obviously never driven package car. And if you have, you have a cream puff route and are blind to what happens to your fellow drivers. Yes we make 60 to 70k a year and some of us make 100k on our extended routes. Package car is one stress after another with time commits and then, if we don't get done in a timely manner, we get grief from our management to kick it out more. Some of the routes I've done are impossible to get done in a timely manner and then they have the gall to demand that we magically find the time to get sales leads. I get the feeling that I could turn in 10 sales leads in one day and still get in trouble for being over dispatch.
In the case of utility drivers I would agree with you but a competent experienced driver on his own route has the time to make sales calls on a normal day. Of course late air, inclement weather and misloads can diminish the time available.