I completely understand your original post and what you are saying. Let me throw out another reason why P&G are a good thing. I walk to and from work, and do not own a vehicle. I am trying to grab one cache a day and without a car this is a tough hill to climb. For example today I walked home from work (88 degrees Fahrenheit) with milk. I didn't have time to hike but being able to grab a simple one on the way home was very convenient.
Also I agree with an earlier point, you set your own standard. You are free to hide caches wherever you want (within the guidelines) and if you want to hike 10 miles to plant it, and 10 miles every time you have to maintain it then you can feel good about your cache location. I intend on hiding a couple once I upgrade and I have some places in mind for 2 different reasons; first, the view on some is good, and second I just think the hiding places are good.
I think P&G light post and other simple caches are a necessary evil, they serve a great purpose but even in my first week of caching I am already trying to avoid them. I appreciate the heck out of everyone who has ever hid a cache and don't wanna knock anyone's effort. The one a day challenge, and probably others I haven't heard about yet, would be a lot tougher without them. Some P&G are pretty creative in where they're hidden and can be difficult, you might be surprised what you are missing.