"After Epstein's victim said she had been coerced as a teenager to have sex with the now-late MIT professor Marvin Minsky,"
Actually, the statement was that she had been told to have sex with the now-late MIT professor Marvin Minsky.
Stallman's gift was was to phrase his argument (* illogical emotional outburst) under the assumption that Minsky had indeed had sex with the victim.
AFAIK no post accusation wave of claims against Minsky bubbled up despite many years of opportunity he had as leader and mentor
to pester and manipulate women.
There is also the fact that most 78 year old men would just not feel comfortable with the situation which likely would likely have felt odd and insincere.
Yes - Minsky took the money for the Media Lab, which furthered his own career, when he should have known better. The whole thing is rather disgusting.