It sounds like you've given a lot of thought to how to clean guns the right way--without hurting them. It should be pretty plain that cleaning guns the right way doesn't hurt them. Cleaning them the wrong way can hurt them, and it seems pretty clear that you understand that or you wouldn't be able to explain how and why you clean your guns the way you do.I'm always curious at the "cleaning hurts the gun" scenario. Firstly I'm careful and technically competent and have made my living off of being clever with my hands and precise with machines. I know how to identify the right materials for a job. Secondly none of the tools or techniques I use harm metal plastic or wood. I've seen "professional" people use a portable drill to hammer in a spring pin or shrug off the need to etch or even clean a threaded hole before applying loctite. That type of thing disgusts me. I'm not in a foxhole in the Ardennes, I'm in a comfortable workplace at 75*F and it's dry. I have the right tools and products with me. I take my time and I do it right. It will be hard to convince me I have caused harm.
That said, it is generally true that overdoing something can cause issues even if the process involved is harmless when not overdone. For example, many guns can be safely dryfired. Unfortunately some people take that to mean that pounding away hundreds of repetitions, night after night, year after year, will never cause any wear or problems. The result of that kind of thinking is broken and worn parts, even pistols with the breaches broken and driven forward by the force of innumerable dryfire repetitions.
Does it hurt to brush out a particularly heavily leaded centerfire bore with a stainless steel brush once in a great while? Probably not. But that certainly doesn't mean one should do it after every shot, or even after every range trip.
Does it hurt to use abrasives or metal brushes to clean all the burn marks off the cylinder of a stainless steel revolver before selling it or taking a picture? Probably not if it's done right. But doing so after every single range trip probably isn't helping the gun any.
Virtually anything can be overdone. Complete disassembly is another example. It's worthwhile to do a detail strip and clean at intervals--maybe once a year for a heavily used gun--or every several thousand rounds--but it is not necessary on a frequent basis. Taking a gun apart completely too frequently can cause problems. I've taken a few armorers courses and the guns used in the classes had been detailed stripped many, many times. They were definitely much the worse for wear in spite of having been shot very little, if at all.