I think the biggest take-away from "cancel culture is bad" letters and articles is that they never come with specific examples. For example, Gareth Roberts says he was cancelled but never say why https://en.wikipedia.org/wiki/Gareth_Roberts_(writer)#Transg... He said transgenderism is "It's almost like a clueless gayboy's idea of a glamorous lady." It's ok to have an opinion, but if you insist it beyond being respectful and/or scientific evidences, you deserve a backlash.
It's almost as if actions have consequences.