I completely agree that qualitative feedback is the most valuable kind of product input.
However, quantitative metrics like telemetry are used to answer different kinds of questions.
> How big peoples projects are on average doesn’t matter.
To give concrete examples, at my current company we do not collect telemetry and have regularly encountered problems where some assumption about customer usage (the number of items in the largest project, the size of the largest document, the smallest browser window, the oldest browser version, the usage of a deprecated feature) turns out to be incorrect, sometimes wildly so, and we only find out after a customer finally complains that they've been struggling with something for months.
If we had telemetry we could have known about these issues well ahead of time and in many cases avoided the problem in the first place. We still choose not to have telemetry for many of the reasons presented in other comments, but we should at least be honest that it can provide immense value to the product team.