You don't need to know how to run a nuclear power plant, but you do need to know what wires are

This analogy actually works kind of well. Like, you don't actually need to know anything about wiring to use a light switch, but if something goes wrong in your house and you need to fix it, having just a little bit of knowledge about how the device works can save you hundreds of dollars and days of downtime.

It can also help you avoid making the mistakes that cause those problems in the first place, whether the issue is that you don't know what setting you accidentally changed, or you don't know how many watts you can safely pull out of an outlet