system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is every installer called wizard ?
gpt
To understand why installers are called wizards today you need to know what it was like to install big software programs before we had wizards.

Sometimes an installation could be pretty straightforward.  A simple unpacking of compressed files and sub-directories into a specific directory or sub.  You don't need a wizard for that.

But then people started making software that had multiple configurations.  Other people started making software that made changes to how your operating system behaved.  And yet more people started making software that needed to install its own support software first.  And none of this was automatic or easy.  It involved typing in specific commands and manually changing settings in your operating system prior to or after the install...or the software wouldn't work.

Then, someone came up with the idea to create an interactive interface that presented these options and permission requests to the user during the installation.  A few buttons and some check boxes, and PRESTO!  you're complex installation with all the configurations and customization you wanted are taken care of instantly, like magic.

And this step-by-step guideline process could be applied to more than just installations.  It may surprise younger people, but sending a file to a printer and having that printer apply ink to paper in the fashion you expected was not always that easy.  It was made easier with wizards, which hid away all the complicated configurations, asked you about the things that the average user was most concerned with, and then magically made everything work the way you wanted.

So why wizard, and not sorcerer, or warlock, or mage?
Well, before wizards existed to automagically make software work simply and easily, the people who knew how to actually operate computers were often called wizards. 

They were called wizards because wizard's specifically are the men and women of fabled stories who read ancient tomes of arcane script and managed to extract the secrets of magic from them.  No common man could simply read a spell-book.  The terminology and symbols were as foreign as different language, and only the most intelligent could decipher them.  Computer wizards read technical manuals and programming books during a time where the assembly language of computers was not a commonly understood or easily readable thing, and they unlocked the secrets of that language to harness the limitless power held within a microchip.