Database architect is not lead of DBAs by default: you can be good in product but be bad leader
Database architect is person who know product very good (see link to Microsoft Certified Architect Program and find what Architect need to know )
There is nothing in my post about lack technical skills required for leader
To be leader you do not need to be database architect - it is about leadership skills first then knowledge of your product\business\industry\etc.
All the description of database architect in the article: can be found in regular job description for senior DBA position \ DBAs lead :
Define the administration scope in terms of targets and risks / costs
Build up an optimized processes model which can maximize the ROI for the current resources
Pioneer in evaluating / choosing the right mix of technology
Explore / create innovative methodology to adapt to business environment.
Act as a facilitator / advisor for the stakeholders to best use the data system / asset.
In real life - it is all about your company business culture (mostly $$$).
Yes, you can tell your boss - lets try something new...
Sure, but in middle of your conversation you will get call from end-user about all system is slow -that bring you back to the Earth...