Certainly many dogs are in schedules that are more demanding, even to the point of 10 hours crated while their owners are at work five days a week. This level of crating is very challenging over the long term and some if not many, will end up with anxiety as a result and become difficult to crate, destructive when they are out, hyperactive and generally neurotic as they have few options in dealing with this level of stress. To suggest that these dogs would be better left loose in the house is equally irresponsible as they are so stressed as to now lack (assuming they ever had them) the skills to deal with good behavior while loose. For a dog that is either inexperienced or now expressing the result of a poor crating schedule, the best choice in most cases is to introduce the dog to a more ideal schedule and regular breaks (ideally starting at more often than every 4 hours).