Complex sentence: Ejective fricatives are quite rare cross-linguistically, and when a language has such sounds, it nearly always has so if was actually affricate, it would be extremely unusual if was fricative rather than affricate.
Split into simpler sentences: Ejective fricatives are quite rare cross-linguistically, and when a language has such sounds, it nearly always has. Hence if was actually affricate, it would be extremely unusual if were fricative rather than affricate.