RMS comment was entirely reasonable if rather perilous to write: "We can imagine many scenarios, but the most plausible scenario is that she presented herself to him as entirely willing. Assuming she was being coerced by Epstein, he would have had every reason to tell her to conceal that from most of his associates”.
In no way did he ever say that "an enslaved child could, somehow, be “entirely willing”", just that she could have presented herself as being willing... The thing is there's no denying that Marvin Minsky was extraordinarily stupid to associate with someone who had a prior conviction as a sex offender and furthermore to have sex with anyone when invited by that person but that doesn't change the fact that RMS argument was mischaracterized and should not have resulted in him resigning...
This kind of mischaracterization and excessive outrage destroys rational discussion between people. It just creates a culture of fear and forces people to hide behind anonymity when engaging in any discourse over this.