For decades, ambiguities in the report on President John Kennedy’s assassination had offered fuel for wild speculation about what had actually happened.
Right, ambiguities are inescapable in many tragic events but that doesn't justify wild speculations about what actually happened.
Also, what are claimed to be ambiguities often simply aren't. Rather they are assertions of ambiguities by those who are not inclined, equipped, to evaluate facts and evidence of a forensic nature.