Not just this, but they're assuming that everyone's server setups are enterprise-grade! People regularly still put raspberry pis and other kinds of low-cost com

Not just this, but they're assuming that everyone's server setups are enterprise-grade! People regularly still put raspberry pis and other kinds of low-cost computers on the public internet (William Gibson, for example, hosts hackers.town on a server setup in his (probably metaphorical) basement), and their answer to that is: "Don't do that".