I think your conclusion is also wrong. iPad sales are flat, and wearables are actually declining:
(Wearables, home, and accessories already surpassed Mac sales, although I don't know what exactly is included in accessories.)
Also, I don't think it's useful to compare wearables to Mac, because Watch isn't much of a computing platform, AirPods aren't a computing platform at all, and Vision Pro has almost no sales. This category is mostly accessories to iPhone.
I find iPads only marginally interesting now that I don't travel as much. Although the newer magnetic keyboards make them more usable as laptop replacements than they used to be. (Still not totally sold--maybe next longer trip.)
Re: Macbooks generally. My mind was somewhat blown when a former co-worker told me their kid didn't want a Macbook. They were fine with an iPhone for their schoolwork.
Personally, I still find MacBooks as the least replaceable category--other than the iPhone. Anything else I could live without as needed.
The OP was referring to dollar sales, not unit sales.
Apple no longer announces unit sales. In any case, it has always been true that Mac Average Selling Price is much higher than iPad Average Selling Price. In the sense of unit sales, iPad is bigger than Mac and has been for many years, so in that respect the 2024 Q4 results would not prove anything new.
The OP was giving a false narrative about future growth that is contrary to what recent quarterly results have shown.
2025: iPhone $209.586 billion, Mac $33.708 billion, iPad $28.023 billion, Wearables, Home and Accessories $35.686 billion, Services $109.158 billion, Total $416.161 billion