I'm not sure what part we disagree here. Yes, technical quality matters. But it matters way less than delivering something that users need. And yes, better technical quality ceteris paribus equals better software.
We disagree whether meeting the needs of your users is a technical challenge. The ability for software to meet changing needs is a technical quality of the software.
The ability for software to meet the needs is mostly a technical problem. After all, it is a feature of the implementation. But that is not the bigger problem. The bigger problem is to figure out the needs and that is not a tecnical problem.