Yeah, that makes sense. Okay, maybe you can playtest while you’re still developing the game, but once the game is ready to be played in full, you can’t continue to play it unless it’s for making updates or whatever. Basically you can only play it for the purposes of development, not for the sake of playing a game.

Or maybe you can’t playtest at all and you do everything blind and the end result is a chaotic mess, that could be fun too. But probably the first one.