Agree with the foremost,but not the latter, especially the last.
99% of threats are curious kids, dishonest family/guests and smash/grab druggies, so yeah, but a serious thief, no.
Its been proven that concentrating valuables in a cheap RSC means they all get stolen in a break-in.
But without a RSC they're most often split up in various locations and thieves likely miss some, e.g. cash, jewelry, hidden firearms.