I crate for my dogs' safety. They love their crates, and will go in them voluntarily to rest or to chew a bone.
1. Weather - I live in tornado country, I'd rather have my dogs safe in crates, in a well-enclosed room, then running amok if a tornado hit.
2. Each other - Incidents happen. If I am not at home, my dogsa re usually in their crates, in case one offended the other and a fight broke out. Now, with my dogs that is HIGHLY unlikely, as they love each other and are best friends. That doesn't mean one won't ever **** off the other though, and a scuffle is started... and when that happens, none of my dogs are the type to back down.
3. The safety of others - I rent, so my landlord and his maintenance crew sometimes stops by to do repairs. My dogs are territorial, they WILL corner any stranger if they enter my house.... and that's not what I want my landlord to experience, especially since he's nice enough to let me have the dogs in the first place.
4. Safety from their environment - I remember seeing my male's sister running through the house, with a 9" long, razor sharp kitchen knife she'd pilfered from the kitchen... she thought it was a game, but one wrong move and she could have lost a tongue... or her life. Dogs are inquisitive and curious, and a house cannot be 100% dog-proofed. I'd rather come home to safe dogs, than deaddogs who hours earlier thought it would be fun to chew on something deadly they found or "liberated: from a drawer or cabinet.
5. Safety from anxiety - yep, that's right... one of my dogs gets very anxious if he's left out of his crate, especially if he's alone. He'll whine and pace, bark and cry, and become desructive. He feels safer in his "den", but he doens't have the sense to stay in there when he's feeling antsy.
6. Safety in strange situations - I've seen what happens when a dog that have never been crated has been required to be put in a cage, either at the vet's office or the groomig parlor... it's not pretty. They scream, poop themsleves, bite at the bars and break their teeth... what a nightmare! My dogs travel, they go to shows, they go to the vet... they need crate manners.
I can't imagine not crate-training, but I won't say that people who choose not to use them are bad pet owners. We all have our different styles and opinions, which is fine... but please try to understand why many of us use crates.