Every single one of my dog trainer friends believe in crates AND keep their dogs in crates. Again, crate vs roam free is and not the issue. That is my personal choice.
Everyone around you does it, so that makes it ok? SS officers in Nazi Germany used the same excuse, and look what happened there.
Who the hell keeps their personal pets IN CRATES? It is cruel and inhumane. I don't care how you choose to (mis)characterize it. Locking up a poor animal in such a way is just plain wrong. Why don't you just get rid of the animals if you don't like them being able to move around your house?
If you are going to argue that it is humane and decent to keep them locked up in such a way, let's do a little experiment. Why don't YOU live in a crate, just for a week. It's ok, there's nothing wrong with it. You'll be fine.
If, after a week, you can honestly say that the experience was not harmful to you in any way, and that you didn't suffer psychologically from being locked up, then I'll agree with your choice. Remember, the key here is "if you can HONESTLY say..."
What you are doing is bordering on animal abuse, no matter how you slice it. You opened the door by admitting to such methods to keep your precious home clear of any signs of life.
The irony is, you claim to be a dog trainer. Yet, you can't seem to train those dogs well enough to pee outside? Some trainer you are!
For your information, there are millions of households with perfectly house-trained dogs who don't do their business in the house, and 99.9% of them roam the house freely 24/7!
The idea of keeping poor sweet lovable dogs LOCKED UP pisses me off like you wouldn't believe! If I were to meet you, I'd probably knock your teeth out. (That is not a threat, by the way. I have no intention of meeting you, ever.)