If you only run your own software and are conscious about your dependencies, then dependency creep is gonna be less of an issue, but don't forget that your dependencies often bring theirs too. And third-party software is very often much less mindful of it.
But even besides dependency creep, containers simplify your software env, simplify backups, migrations, permissions(although container are not replacement for secure isolation), file system access, network routing etc,etc,etc.