[gamblor956]

If you make inferences from non-public information (e.g. talking to the CEO) you can freely trade on that, provided the CEO hasn't shared MNPI with you directly

This is pretty much the literal definition of insider trading, but feel free to follow this advice if you plan on having a long discussion with the SEC while they audit all of your trades for the past decade.

And these communications are not made public and shared with other investors.

This is false. IR departments will only discuss information that is already made available to investors, through press releases or public compliance filings (such as SEC filings). They absolutely will not provide nonpublic material information just because someone asks, and in the event they do so, it's literally their job to provide an investor communication so that the information is publicly available.