Another good point: if the cancel-culture we are currently suffering under now was practiced in the 60s, black people, women, minorities, etc would never had gotten equal rights.
It's because everyone was allowed to speak that the message came across and won minds. The fact that people are asking for the silencing of their opponents is a good indicator that their arguments do not stand up to scrutiny.
Like it or not, RMS does scrutinise the status quo. Petitioning for exemption from critics makes it hard to support those people doing the petitioning.