QA is also about: 1. Exploring every corner of the software, comparing it to the written spec, and measuring any discrepancies, even those not visible to the user. 2. Exploring beyond the corners of the spec and using that exploration to improve the documents. 3. Writing software to automate this exploration and to automate defect-finding in general. 4. Fuzzing and other “red team” penetration testing. 5. Participating in design reviews and contributing towards the testability of the product. In other words working side by side with the developer to ensure the hooks are there to make the software testable and automatable. 6. Monitoring metrics and telemetry to find trends that are emerging post-deployment and getting them documented and reported before they are widely noticed.
And so on.
QA should be a highly skilled, highly technical job, a level equal to developers. If QA at your company is just waiting for a new build to get thrown over the wall so they can manually test it in a vacuum, your company might be doing it wrong.