I think there's a holdover in thinking from when people who blocked were viewed as dramatic, narcissistic, or overly sensitive. Times have changed. Blocking isn't about being unable to handle criticism or differences in opinion, or being unable to engage in discourse. There is no discourse. Hell, "discourse" now seems to be an ironic term for an online interaction with someone who argues by accusing people of criminal behavior. In light of that and other, similar behaviors, blocking is now an important part of taking responsibility for how one experiences fandom.