True but Unfortunate, Raw Material Suppliers  Would like You To Believe That If You Buy Their Raw Material, Your Architecture Will Come For FREE? 

What is Architecture of ”Solution” vs Architecture of “Raw material” and how does it work?

This is significant but it's easy to understand. Imagine how does it happen in Civil engineering world. If we need to construct a 50 storeyed building, you get the Architecture models. Then choose the raw material such as cement, steel, etc. The Architect of the 50 Storeyed building is focussed on the Building's Architecture (i.e. definitions, representations, and specifications for multiple stakeholders and concerns) and allows the contractor to choose implementation raw material such cement (Lafarge, Holcim, UltraTech), etc or Steel (ArcelorMittal, Nippon Steel etc.).

Please remember the architecture of the raw material say Steel or Cement is a different concept than the architecture of the building.

Similarly, Architecture of your Software System is different from Architecture of the software raw materials that you plan to use for implementing your software system. Unfortunately, raw material suppliers (Amazon, IBM, Microsoft etc. would like you to believe that if you buy their raw material, your System Architecture will come for FREE.

To become a successful Architecture of Solution vs Architecture of Raw material needs different skills. It's not about right or wrong, it's just that they are different skills.

Pointing In The Right Direction.