Your statement is accurate.
Canonical does collect mundane information such as computer specs, whether live patch is enabled and so on. No personal data or personal identifiers.
You can check and manage transparency with the terminal command
ubuntu-report
to see the data.
You can fully Opt Out.
ubuntu-report -f send no
Why collect this data
Whenever you have struggled with trying to get the kernel drivers to recognize some hardware, it will give you a good idea of how this data is beneficial to the users for developers to have it.
The developers need to know what hardware to focus on, what needs work and what drivers are needed. And unless the users are willing to fill out anonymous surveys in their own time (probably not), the only other way to know is to Ask.
There is another piece of software Canonical uses: Popularity Contest. This app notes how often certain apps are used. This can be removed with
sudo apt remove popularity-contest
to prevent it from recording and sending that data.
I find popularity contest to be useful, though. I want to know that my preferred apps are represented and won't be abandoned or deprecated.