It's been a few years since I edited Wikipedia seriously, but the criterion for inclusion on Wikipedia is/was “verifiability, not truth” (https://en.wikipedia.org/wiki/Wikipedia:Verifiability,_not_t...) – what matters is not whether something is true, but whether it has been published in a reliable source (https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources). Accordingly, Wikipedia tries to be based on secondary sources (rather than primary and tertiary ones). The relevant section (https://en.wikipedia.org/wiki/Wikipedia:No_original_research...) says, among other things:

> Primary sources that have been reputably published may be used in Wikipedia, but only with care

and I imagine a Wikipedia edit summary does not count as a reliable source. (For one thing, despite it being very plausible that the Wikipedia user Scarlsen who signed himself as Stephen E Carlsen is indeed that person—I believe it completely!—it cannot be guaranteed that it wasn't an impostor, for example.)