If 'components' were that useful for the things rdbms's are used for the thousands of highly trained phd's at oracle, microsoft, ibm would have added them to their sql products.
Of course, this a ROR crowd, software invented by a business school grad/game review writer, so it's can be an uphill battle explaining this stuff.
Clojure tends to emphasise simple components that do specific tasks; so core.logic focuses on logic programming and not, for instance, persistence or atomicity. Because it's so focused, it's more capable in its particular area of expertise than a more general tool like SQL.
