The problem here is that most people who suggest 'just ignore it' as a solution haven't ever faced the sort of abuse that the proposed law is designed to deal with. You're quite right that it's easy to ignore an insult. It's much harder to ignore a believable death or rape threat, racist remark, misogyny, etc. That is what you're suggesting people should 'learn to not give a fuck' about. As someone who believes quite strongly that we shouldn't just ignore those things and that we should actively try to stop them, I find your argument incomprehensible.