Not that I am disagreeing with you, you can often tell if the OP is a “devil around every corner” type. The “cure” is often the same. Frequent the sacraments, pray the rosary, pray deliverance prayers.
Demons are truly around according to the Saints, but instead of looking at them as “creeping terrors” they should be looked as a virus, or mites that you could catch by hanging around the wrong places. A little prayer, rosary, confession, and communion, and you’ll be right as rain.
They need permission to act against us, unfortunately when we use porn or witch boards, we are in fact giving them permission to bother us sometimes. Even then, they have to have permission. Does this mean that every time we partake in mortal sin, we suddenly get shadowed by demons? No, not at all, but as in medicine, it isn’t always a bad idea to be a bit proactive.
I am with you though, rather than indulge the ideas that somebody is beset with demons, we are better off simply suggesting the remedies, which are appropriate in ANY case being it our own sinful nature, or a few mites we picked up on the dark side of the woods.