The Debian init system general resolution returns

None of that is true, restarts have a holddown timer so configuration errors won't result in an endlessly restarting service unless the admin specifies, it also exposes a simple watchdog protocol that a daemon can opt to use to signal that it's still healthy, mount points are dependencies in systemd so it won't try to start a service if the underlying storage dosen't exist, preventing data loss. Obviously pid 1 can't prevent a hardware failure or an application failure, but it gives you best-of-breed tools for handling failures that might occur, as good as daemontools or anything else out there, and included by default applying to all the relevant software you already get from your distro.