At some point you have to put more trust into your home network than you would a public network. Not as far as accepting all communications, obviously, but in t

At some point you have to put more trust into your home network than you would a public network. Not as far as accepting all communications, obviously, but in the sense that you have to open ports and services in order to accept incoming authentication requests and subsequent authenticated connections. A locked door is weaker than a stone wall, after all. You're trusting that it's safe to have a locked door than a stone wall.