Why doesn't the installation of an addon also install its needed libraries
 

Minion is supposed to be a simple install-any-addon software, and yet I have to manually install every library needed for a particular addon.

Why doesn't the installation of an addon not also trigger the installation of its required libraries?

Answered multiple times in different threads.
Short answer: Minion 4 will have it. But needs time as revs code for free in their free time.
Just wait please and currently do it manually ONCE, and next updates will be done with 1 click even with Minion3 then.