There's no difference between the people doing the cancelling and the person being cancelled, from a "what are their fundamental rights?" perspective. Both must be kind, and both can face shame and shunning for failing to do so. "The Demand for Rigor" here is not Isolated.

More "cancellers" should be shamed and shunned for failing in this way. Isabel Fall should not have been ridiculed for her work, Ken White would agree with you on that.