I used debug items all the time in Sims 4. How does Sims 3 debug compare? I don't know if we have collections in Sims 4, but I see this wiki that says we can put debug items in collections in Sims ...
I use buydebug all the time to add the martial arts trainer and board breaker to my gyms. And also use the spawners to add items to worlds that don't have them.