We all do silly things occasionally. Absolutely zero judgement from me since I’m the user who accidentally imported their entire Mac library into a database. DT has various failsafes, but it can’t always protect against the brain controlling the keyboard. That’s what @BLUEFROG is for 
@gpauley Time Machine or similar is a good backup idea generally, but I also do manual backups of my databases which I find reassures me more and means if disaster ever strikes I have zipped copies of my databases ready to fire up at a moment’s notice.