I don't think I have read that one. I suggest you google Dave Ramsey and read about the snowball technique to get rid of debt. I warn you, it is not fastlane, it is a basic financial principle you must understand and master.
Your question about what to do is a common one.
You have X amount of debt and could cover it with cash you have available.
Should you pay off the debt or invest that money?
You will find the answer is pretty much the same:
If YOU can take that money, invest in on something that produces a higher return than what you are currently paying then, by all means, invest it and make that happen.
For example, if your monthly payment is $200 and you know you can invest that money on something that produces $300 a month then, obviously, invest it.
On the other hand, if you don't have anything else to do with the money then paying the liability may be the best solution for you.
Only YOU can answer that question.
In my case, I am moving forward. Dollar I get, dollar I reinvest to keep moving forward.