Nowadays, DFW has a reputation as a ‘bro’ writer, and there are stories about him abusing a girlfriend, so his reputation is a bit diminished.
As for the watch, not a big deal for me. I use Google Fit, along with a Carlyle Gen 5 running Wear OS, aggregating much of my health data, sleep, glucose, BP, weight, HR, activity, and fitness. Apple watchOS is considered better, and the watch more accurate, although Wear OS has been great for me.
Since I have Google Fit tracking my activity and aggregating my data, I put together a Jupyter Notebook in Python for analysis. I shared that in the forum, different thread, and someone with an Apple Watch, but less of a developer, had issues getting Apple data in any form he could use. It was easy to use Google Fit, as it provides a summary CSV file that can easily be sliced and diced.
The thread I started about diabetes tech, in which it was discussed:
What Tech Do You Use for Health Monitoring? - Diabetes Technology - TuDiabetes Forum
The Jupyter Notebook is on GitHub, by now modified so it is only good for Google Fit data, but at one time I had written it generically so that any data could generate a correlation heat map: