Way back in time, there were always a bunch of 'car' kids, some of who turned into mechanics (most of them very good ones). But yes, times have changed.
And is the main reason why the few top shelf techs quickly figure out they can do much better for themselves by going to work for an indy shop, or even starting one of their own. So the stealerships are fine with just kissing the talented ones good by, instead of paying them what they're worth.
I took another look the job specs, and there's a lot of parts coming off and on; including (but not limited to) valve cover, both cams and all associated components, timing chain (partial removal), electric VVT motor and actuator, HPFP, and vacuum pump.
So this seems to my DIY mind, to be quite a bit more than a 4 hour job, particularly for a tech with average skill, knowledge, and motivation. However I'll also add that I certainly could be wrong about that, and agree with you that a very good and fast tech who has done this job a number of times, might very well be able to turn it around in 4 hours. In any case, I'm very much hoping to never experience any of this first hand.