I suppose I do see the intention. As a game developer, you'd be free to program in mandatory no-reverse Ironman style gameplay if you chose. I don't think giving the author an option to lock choices in is necessarily a bad idea, although I do get concerned some authors could apply it to their stories for poor reasons and end up simply frustrating their reader.
To the idea of whether or not you can force the game to be played a certain way: while I agree a player who wants to badly enough will always find a way to break the game, I do think it's possible to obstruct enough hurdles that you make the prospect of jailbreaking too daunting for it to be worth the effort. It's sort of the difference between a CHYOA book and a video game with choices: in a book, even though it's intended to be read sequentially, the reader can actually flip around in it wherever they like. In the video game, they generally can't play it out of sequence unless they're actually cracking it open.
I think I've mentioned this elsewhere, though, that the real merit to this idea is whether or not your story will actually benefit from the reader being literally restricted. Even among video games, I'd consider it a very niche experience to not offer the chance for players to reload a save to retry things at all (see: Ironman modes, as I mentioned before).
Well, in short, I do see the appeal in limited cases. If I was going to make it a box for writers to check when making their story, I'd probably put a note like "not recommended for most cases" or something to discourage writers from using it carelessly. Basically, I don't think I'd want to see it become the site default. The way I play a game mode story is generally to choose one path as my "in-character path," then pause the story and read the other branches. I don't want to just not read the other stuff the author cooked up! In that scenario, it already bugs me having to pause a game mode story in order to jump around the chapter map, or else forget and stub my toe on the dreaded "Back to the current chapter."