The Shell is a Program
Summary
They’re not very computer-minded, so troubleshooting doesn’t come naturally, and anything that requires dropping down to the command line is something that has to be done by rote. If you are a technical person familiar with Linux, you know there’s only one place to type things in: “the shell”. On a Classic Mac, there was no command line; the closest equivalent would be “running an AppleScript” and that’s not an interactive environment. On an embedded system, you might have standard input and output channels over a wired connection, but they may or may not look like shell commands. But that idea that the shell is the default, on any OS, is not some innate truth about computers, especially now that a teletype isn’t the most common way to interact with them.