Can't find anything to argue with in that set of posts, except perhaps for the part about systemics. I feel they do have their place, though in a limited role. I won't apply systemics to any plant growing in my yard. I will use them on potted plants, subject to the following constraints: (1) I've tried other control methods and they have not succeeded, plant is being damaged to point of danger to its health, and (2) the plant doesn't (or won't) produce flowers/pollen/nectar that would attract pollinators. So, for example, I will apply to my pine and juniper bonsai to control the scale that has resisted all other control methods. I won't apply to something like crabapple, quince, etc.
Otherwise, I always try to identify the problem before deciding on any treatment. I'll try water sprays to dislodge pests, then something like oil or soap. I don't mind some damaged leaves and would prefer to allow natural predators to do as much of the work as possible.
Chris