Defense in depth is important. Lots of data breaches have been caused because things that should have just been viewable from a local network, weren't, or the n

Defense in depth is important. Lots of data breaches have been caused because things that should have just been viewable from a local network, weren't, or the network was compromised. Unless you think every single employee is invulnerable to spear-phishing (which is impossible), you should never be leaving anything sensitive wide open on your local network.