Then I think the problem is one of nomenclature. You see, when I first saw the stats, I also thought that the "code" metrics meant actually programming. It does not. They are not programming anything, as far as I know, in the sense that you and I might understand it. When they talk about "coding", they mean the scripts that place the characters in the scene, pose them, move them around, change their facial expressions, etc. I'm assuming you know Ren'Py, so you already know there's no actual programming in that. But it can still take a lot of time. They are not touching the game engine, as far as I know, nor writing a single line of actual code. Once you adjust your perception of their metrics according to that, it all makes much more sense.
Now, regarding the tone of my reply to you. It was sarcastic, and a little mean. But I also think your actual comment saying it can be done in 4 weeks with AI was hyperbolic, so I feel it was warranted. You may feel they take longer than a professional would, I also feel that way. But you must admit that "This whole game, Codewise, is made in 3-4 Months, with AI help" is simply not true. Unless by "codewise" you mean actually programming. Then, it can be done in less than 5 minutes, as they are not actually programming anything.
So I think it was either a matter of misinterpretation or trolling.