yea a safe alone is not a secure method of store. It's just matter of time and safer methods only delay opening more. It's still a good tradeoff in my opinion between privacy and secure storage.
The vast majority of packages don't need extreme security.
Personally I don't care about security of my packages at all—they just sit outside my door for me. If one is lost/stolen, Amazon will happily replace it.
Anecdotally, I've had a phone delivered to me but my neighbour took it in fearing getting stolen and then later gave it to me after I've reported Amazon as not delivered by due date and carrier has confirmed having delivered by the door. This was in apartment setting so everyone was acting reasonably. Amazon ended up shipping me another phone and I ended up with two phones. I think I just prefer the idea of things getting delivered with determinism and security--just so that it saves everyone time and effort. I may be a bit paranoid about this.
Personally I don't care about security of my packages at all—they just sit outside my door for me. If one is lost/stolen, Amazon will happily replace it.