Training changes behavior over time. Management helps you live safely and successfully while that change is happening.
Rehearsal makes behavior stronger
If a dog repeatedly jumps on visitors, steals food from the counter, or chases the cat, every successful repetition can make those behaviors more practiced.
You don't need to wait for training to become perfect before preventing the rehearsal.
Use the environment strategically
Baby gates, closed doors, pens, leashes, covered trash cans, food stored out of reach, and controlled greetings can dramatically reduce opportunities for unwanted behavior.
This isn't cheating. It's changing the environment so your dog has fewer chances to practice something you're trying to eliminate.
Training and management work together
Suppose your dog steals socks. Teaching a strong "drop it" is useful, but keeping laundry in a closed basket is management.
The combination is much stronger than either approach alone. Training teaches your dog what to do, while management reduces the chances that the unwanted alternative will keep paying off.
Good trainers don't just ask, "How do I teach this?" They also ask, "How can I make success easier right now?"