As I have said repeatedly, nitpicking used to be fun. Chekov never met Khan; he wasn't on the Enterprise. Did the universe fall apart? No. Did I need an explanation? No. I just laughed about it and moved on.And depending on which nitpick the critics brought up it could quickly become not only tiresome but obnoxious.
Increasingly, continuity, or canon, as some misattribute it, is weaponized to make grander claims of conspiracies and injuries to fandom.