I do see my comment in context of using SQL for your Queries while your main focus as a Developer (like for java etc.) is not writing SQLs as your main priority.

Also it does state 'we can do better than sql' and i do have a certain amount of practical experience to state my personal opinion that i do not think that their approach is actually better than sql.

They did show quite avg examples; Examples which are leading me to assume certain points like where they would like to replace sql.