So, from my perspective, I guess I personally agree with the fourth opinion. And you have to do what works for you. Sharing genealogical information from your GSP in the form of files with others and receiving the same can be a great way of obtaining important new leads. It can also cause you to question your own data and the conclusions you have drawn. It is always essential to evaluate and reevaluate the body of evidence you have compiled.
Genealogy is a wonderfully challenging puzzle.
Use all the resources available to you.