Wikipedia just summarizes the primary sources.

Wikipedia actually much prefers secondary and even tertiary sources to primary sources. They have rules against original research, and follows the guideline that “secondary or tertiary sources are needed to establish the topic’s notability and avoid novel interpretations of primary sources”. It’s only with exception that primary sources are allowed, in which the primary sources “have been reputably published may be used in Wikipedia, but only with care, because it is easy to misuse them.”

Not disagreeing with you, just a bit of nuance.