I'm not sure what that has to do with a third party peripheral. You may be confusing a Wacom tablet for something like an iPad or Nexus 7?
EDIT: For others who may be confused, a Wacom tablet is used to provide a pen/stylus interface to a computer. It's an additional peripheral, similar to your keyboard or mouse, for your computer. It is not a standalone independent computing platform.
They do mostly make external pen input devices, with or without screens. Which people have been calling “drawing tablets” since loooong before “tablet computer” was a phrase anyone used outside of maybe science fiction.
GP must have confused with the currently better known use of tablet, which is a full-blown computer with touch screen and no keyboard.
More broadly, we need to get away from this whole "but don't other people do the same thing?" dialogue when it comes to privacy. Yes, these issues are prevalent. That doesn't mean it's trivial---quite the opposite, in fact.
> How do I know that data doesn’t go back to Apple with “telemetry”?
By checking the privacy policy. Also, you can opt out of telemetry on iOS.
As a better example, suppose it were a game controller. Then the question "what games are people using this controller with?" seems quite reasonable. Filter to games only and anonymize the data and that would be fine.
[1] https://www.reddit.com/r/privacy/comments/8klf7a/razer_synap...
[2] https://www.techradar.com/news/razer-synapse-3-app-delivers-...
> Help Apple improve its products and services by allowing analytics of usage and data from your iPhone.
It’s enabled by default, but when you set up a new iPhone, it prompts you and gives you a button to turn it off (it’s not just buried in settings).