But if your puppy has NO manners (because it's always in a crate), isn't housetrained AT ALL, unless it's immediately released outdoors (after being crated for hours) and is either too fat or too thin (because it has no opportunity to develop muscle tone, what with being locked in the crate all the time, and such) AND YOU HAVE BEEN CRATING IT FOR HOURS each day since you got it 4 months ago. Perhaps, maybe...just maybe, you're doing something wrong.
Sounds like a grossly under educated puppy owner or someone that shouldn't even have a dog to me. So crating isn't the problem.
What about fire?
I have multiple dogs and when I am not at home, my dogs are in one room, in crates, visible from a window and beside a door. For one simple reason, fire.
Save the dogs first, they can be easily seen, easily and quickly removed to safety, no hunting for them because they can't hide. No choice to hide or move away, when the scary breathing masked person approaches. And can't run away or be lost after being removed from the burning house.
I don't have one adult dog that can't be left uncrated and very seldom are they crated when we are at home. Including my youngster, although she is crated at least once daily when I am home because she needs to learn to be comfortable and quiet when I am at home.
Every tool out there for dogs can be used in an uneducated and/or abusive way. Including a simple flat collar and leash when it is used by angry, frustrated uneducated hands as a weapon.