1. Apple was early - Nope, Apple came late to the party, years after first movers were there.
2. Voice computing distraction - Again, nope. Amazon Echo devices and Google Home devices are HUGE. Headphones and earbugs come with Alexa and google Assistant integration. Apple tries with Siri but it's consistently far behind Amazon and Google there.
3. Wearables require design expertise. It’s not enough to just throw together some leftover smartphone components and ship wearables. -- Yet, that's what Apple did with the first gen of Apple watch. Gen 1 was also dead in three years. Gen 1 was a pilot project.
4. Ecosystem and technology advantage. - These are Apple advantages, but not ten year leads.
5. No price and feature umbrellas under Apple. - Well, there are a lot of people still wondering what utility they have aside from a few "health" measures. I personally don't care about my heartrate all day, nor my steps, or a bad idea of calories burned. I don't need to monitor my O2 levels, nor get instant EKGs. I personally stuggle to see the point of smart watches. Notifications? I can see them on the phone screen, it's just as easy for me to look at it. Music controls? If I'm in the car the controls are on my steering wheel. At home I just say "Alexa, stop" or whatever. When I have headphones/earbugs in? I can tap the button on my headphones just as easily as I can tap my watch. What else would I use it for?
There certain is a price umbrella, too, because you have to have an iPhone and be bought into that ecosystem.