IMO, there was all sorts of interesting jazz being made in '73, not just fusion. Consider:
Rahsaan Roland Kirk – Prepare Thyself to Deal with a Miracle (Atlantic, 1973)
Joe Henderson – Multiple (Milestone, 1973)
Eddie Henderson – Realization (Capricorn, 1973)
Cecil Payne & Duke Jordan – Brooklyn Brothers (Muse, 1973)
João Donato & Eumir Deodato – Donato / Deodato (Muse, 1973)
Ian Carr with Nucleus Plus – Labyrinth (Vertigo UK, 1973)
Woody Herman – Giant Steps (Fantasy, 1973)
Airto Moreira – Fingers (CTI, 1973)
Gil Evans – Svengali (Atlantic, 1973)
Marion Brown – Geechee Recollections (Impulse, 1973)
Abbey Lincoln – People in Me (Philips Japan/Inner City, 1973)
Terumasa Hino – Taro's Mood (Enja, 1973)
George Benson – Body Talk (CTI, 1973)
Norman Connors – Love from the Sun (Buddah, 1973)
John Surman – Morning Glory (Antilles UK, 1973)
Flora Purim – Butterfly Dreams (Milestone, 1973)
Ray Barretto – The Other Road (Fania, 1973)
Billy Harper – Capra Black (Strata-East, 1973)
Tito Puente – Tito Puente and His Concert Orchestra (Tico, 1973)
Jack Wilkins – Windows (Mainstream, 1973)
Larry Willis – Inner Crisis (Groove Merchant, 1973)
Larry Young – Lawrence of Newark (Perception, 1973)
And that's just scratching the surface.