Not every unfamiliar assertion becomes correct simply because it is rare. The report adds a defining quality: الَّذِينَ يُصْلِحُونَ ... مِنْ سُنَّتِي, those who undertake correction in relation to the Sunnah.
Such correction requires reliable learning, responsible reference to sources, and good manners. Declaring everyone who differs from oneself misguided is not a sound application.
Example: If an unfamiliar worship practice is disputed, seek grounded clarification and discuss it respectfully rather than treating distinctiveness itself as virtue.