Well, after chewing on this (and my lunch), let me make a stab at understanding dogs better.
A) The reason some dogs bark all the time is because they are alone. Either they are alone in their pen or tied up outside, or they are alone in the house or apartment. Too many people do not provide enough attention to their dogs.
This certainly fits in with what I've observed. I see dogs penned up and tied up outside all the time and they bark all the time. I've seen dogs left in houses and apartments while their owners were gone all day and they barked all day. I have always felt sorry for all these lonely dogs.
B) If a dog is kept in the house, then at least he/she gets some companionship when the owners are home. If a dog is kept outside, then he/she gets much less attention, especially when it's not nice out.
I have known and know several people with inside dogs. They are much more involved with everything that goes on. These dogs even get presents and cards for their birthday and Christmas. I've seen dogs get treated better than some kids I know.
I'm not sure what to conclude from this yet. I was told "don't get a cat unless you're going to keep it in the house" and didn't take that advice. Now I realize I should have taken that advice and not gotten the cats.