Telemetry may tell you the "what" but, at best, it will only allow you to infer the "why". It may provide insights into how people do things, yet it will say no

Telemetry may tell you the "what" but, at best, it will only allow you to infer the "why". It may provide insights into how people do things, yet it will say nothing about how they feel about it. Most of all, telemetry will only answer the questions it is designed to answer. The only surprises will be in the answers (sometimes). There is no opportunity to be surprised by how the end user responds.