Earlier quoted context omitted.
In fact if you get "good enough" at the low end there is more money there than up top. Sure $200 isn't much compared to me income, but it is still more than an impulse buy. If you can get the $20 market it becomes an impulse buy for a lot more people. If you are good enough they compare with their friends and the friends also buy - those who would never spend $200 on an impulse buy, and those who already have and are…
The low price of $20 actually slows my impulse to buy it. Sure, it's not a lot of money, but how reliable or usable can it be for that price? It makes me think of a cheap knock-off device I'd find at a TJ Maxx store on clearance. What makes it so cheap even compared to a Fitbit?
Let's not forget that once upon a time, pocket-watches were only for the rich. It wasn't until the advent of quartz watches that you could find a solid watch (digital or analog) for under $100. Today, $20ish digital watches are fairly common on the market. One of my favorite watches is a cheap Timex Weekender (a favorite of /r/malefashionadvice IIRC).
Just like one might decide to go for a stylish (but cheap) quartz watch instead of that expensive automatic, one could decide to go for a stylish (but cheap) Wyze watch instead of that $300 Apple Watch. We'll have to see if Wyze (or someone similar) can actually execute and pull that off.