Since there's apparently fediblock discourse again: "instance blocking is a last resort" and "instance blocking is a frequent occurrence" can both be true simultaneously.

There's an awful lot of people (including instance admins!) who still need to learn how to deal with community safety effectively and what the impact of their choices is on other communities.

If you want to see the amount of instance blocking reduced, then your focus should probably be on "eliminating the reason for it" rather than "telling people not to do it" or invoking cancel culture rhetoric.

This includes things like "understanding how one admin's failure to moderate leads to everybody else's workload increasing", and "when someone is behaving abusively, the primary focus should be on the safety of the victim(s) and not on the abuser, even when the abuser has trauma/etc. themselves".