Can't quite tell if you're being serious or just mocking the people who champion this line of thought. If you really believe this, you're wrong. There's explicit and officially canon continuity between the games (even if there wasn't originally), and they are now being deliberately written with this in mind even if that wasn't the case originally. I think OoT is when they started thinking about this for real, as it was written as a prequel to ALttP. Then it got even more explicit with WW (the flood being used as a last resort due to adult timeline OoT Link disappearing and Hyrule being left without a hero), TP (OoT Link is there in spirit form, etc) and SS (it's a VERY explicit origin story for everything else). This isn't stuff just thrown into the timeline after the fact, it's actually in the games.
Now, that doesn't mean they necessarily care very much about Hyrule's geography being consistent, etc, but that's different.
Nintendo didn't originally think about it that way, clearly. But they do now, and they explicitly write the stories to fit that now. Then, yeah, they've retroactively tried to make all the old games make sense in the bigger picture (before that existed) by coming up with this three-way-split timeline, but your friend's interpretation (of what the series is doing these days, at least) is in fact officially invalid. This isn't speculation and theorizing, it's official word right from Nintendo's mouth.