A snub is capacity deficient.
An attacker(s) may be hard to stop, example:
https://www.thetruthaboutguns.com/video-crazed-man-attacking-deputy-soaks-up-12-rounds-before-hes-stopped/
12 hits before incapacitation.
Hard to stop could happen anywhere, which is why a Glock 26, Shield, or 1911 (examples) + spare mag is a good desirable minimum everywhere.
A 7 shot 380 is "better than nothing" but that is not a criteria we use by choice to pick a gun to defend life. (If in doubt refer to video again)
Remember I am comparing the snubies with the semi of the same weight, 5 rounds and 17 rounds is a big difference, BUT fair comparison by weight and size, you are comparing 5 rounds to 7 rounds. You trade reliability with 2 more rounds.
Semi are more reliable if it is big, for that small a size, it's questionable. There are physics in this, you need the weight ( the initia) to cycle the gun in semi, if you have less weight, you put heavier spring and reliability goes down hill. So reliability is day and night difference when comparing between revolvers and semi in 15 to 16oz category.