“Lesser truth” is a value judgement, not an objective fact. By my values, this kind of thing would have “lesser” or “greater” importance principally insofar as similar circumstances were likely to repeat. So blaming the outcome on Gore’s specific character traits seems unproductive. Meanwhile, blaming it on the Supreme Court; or the election system; or, yes, on third-party voters’ and campaigners’ misunderstanding of or disregard for the strategic consequences of the election system; these seem to me to be worthwhile.
Your values may differ, and that’s your right; just as it’s my right to argue for mine.