It was not like that before the Fastpass and ADR systems existed. You leisurely walked around the park and went from one attraction to the next attraction. You did not race from one side of the park to the other to get to be able to use your Fastpass. You ate when you felt like eating (in the restaurant you felt like eating in) - sometimes you waited for 20 minutes, but usually you did not. Lines were substantially shorter on average.
Fastpasses are designed to make the person feel like they are beating the system - that is all. They've known for a long time that they do not significantly increase shopping times (as was the initial excuse). The problem is that they are now a source of constant stress because if the person is not using them optimally, they feel that they are "losing" to some other generic park guest who is beating them with optimal usage. And sometimes they actually are getting beat by the system (if you miss the rope drop at DHS and can't get a Toy Story Fastpass).
Fastpasses and ADRs force a family to approach the parks as a Disney Commando or otherwise have a diminished park experience. And typically, behaving as a Disney Commando causes stress (particularly if it's not your preferred method of vacationing). Watching FastPassers walk right by you for 15 minutes while you stand in the stand-by line causes stress. And having a gadget/perks/technology/scheduling induced diminished park experience certainly causes stress.
The standard guest feels stressed by the overscheduling caused by FastPass? No kidding, Sherlock! The optimal fix is more scheduling?
/Not one minute of business school education, so my opinion can't possibly have merit.