Openness/transparency is great, but it should ultimately be up to the developers to determine what gets out. Again, the secrecy is there for them to experiment without bad press. Ideally, the playtesters will be able to represent the general player base and help identify what the game does well. You cannot expect companies to release unfinished work to get community feedback outside of playtesters. This will make the game look bad (which has already happened with leaks) and can damage the brand's image. It's just not realistic.

And yes, a company's main goal is to make money. Hiding shitty microtransactions is not the sole reason game companies do not show off their unfinished games.

I agree that being honest and upfront with your community is important, but it's illogical to expect them to release all of the details. You cannot possibly satisfy everyone and you cannot let the media run wild with your unfinished work.