One important difference between cable capacitance and audiophool effects is that cable capacitance (and inductance, and resistance) can be measured using normal measuring instruments. It is a real property of the cable, there are good theoretical reasons for believing that there should be a measurable capacitance between the core and screen of the cable (for example).
Moreover, it is possible to calculate (or model) the effect of this capacitance (assuming the rest of the circuit is known). No (sane) electronic engineer would dispute that.
And I suspect that if the capacitance causes a significant effect it can be detected in a listening test (although probably not by me
)
But most of the audiophool effects have no measurable properties, they have no physical justification and don't seem to be properly detectable in a listening test.