Yeah Zelda's motion controls are great for what they're used for — but that's kind of my point. Even without using a first party controller, you're still enjoying controls that were designed for their own hardware.
If TotK was released for the "Big 3" consoles + PC, motion controls couldn't be relied on, as not all platforms have the hardware for it. I'm not saying that they couldn't make it work without motion controls, but just pointing out that what makes Nintendo special is that their software is made for their hardware, and both are better for it.