How do you define personal information? Let's use Chrome as an example. Recording what website I visit is clearly personal information. What about recording how many tabs I have open, how much RAM each tab is using, and when each tab was last viewed? Is that personal information to you? I personally don't value keeping that private and it is probably a valuable piece of information that could help the developers improve what has been one of the biggest user complaints about Chrome since almost its release.
I think that is generally OP's point. Each piece of data exists on a spectrum in value for both the user and the developer. Data should be kept private when it has value to the user. There is little harm in sharing the data with the developer when the user would deem it low value and the developer would deem it high value.
My usage data is mine, as is my hardware and network connection.
Perhaps it is better if I approach the question from a different angle. What is the downside of someone having this specific information about you? Can you think of a single negative repercussion from someone knowing how many tabs you have open? That is the fundamental point here.
The idea that all information related to a user should inherently be private just seems like a needless draconian standard and one that didn't exist in the pre-digital age. The privacy value of each piece of information can vary wildly. Some of it deserves protecting. Some of it doesn't.