I agree, this reads like a reporter interviewing someone to get them to define terms they made up. This didn’t sell me on why I should want to use one style of play over another, just wistful “torturing” themself wondering if anyone still uses this mysterious style of play. It’s not mysterious. As you said, it’s just Play to Find Out.
I think it would be more useful to show the strengths and weaknesses of PtFO and as well as more scripted gameplay, because each has a place in RPGs, and knowing when to use one over another is a great skill for GMs to practice.
I’ve found this trope works best when all players know the secret, but the characters don’t. If it’s a cool, interesting secret, everyone can play into it and enjoy the dramatic irony.