The OP made a snide comment to a snide comment. To me it is akin to saying, "why use a flight simulator, just try hoping in a plane and fly it."

If learning chord theory via computer tool designed for that purpose is some kind of cheat, then I guess I should just give up. I don't see using tools to learn as cheating. Since this forum does not allow me to post a photo until my 15th post, I offer this as an explanation of what Harmony Improvisator is:

Harmony Improvisator is an advanced harmonic composition tool. It opens up the world of harmonic theory by making centuries-old knowledge uniquely transparent.

The VST Plugin provides:
Perfect harmonic improvisation.
Composing with the rules of classical harmonic theory - no professional knowledge required.
Complex cadences suitable for all styles of music.
Unique concept of harmonic pattern sequencing.
Automatic calculation of exciting harmonic suggestions.