Why would I have to throw out such a conception if it hasn't been adequately demonstrated to me as being wrong?
The latter. A dog doesn't turn into a fish when it swims, as much as an ENTp doesn't turn Fe leading when simply talking about his objectified sentiments towards things.
Were one to understand what the IEs actually attempt to define then this wouldn't be a problem. But if I'm gonna play devil's advocate I'd say such correlations would go Se/Te, Ne/Fe, Si/Ti, Ni/Fi (sharing the external/internal and object/field dichotomies).
I haven't thought about it too much, but I imagine that Je types could be seen as more bent towards phenomenology. Perhaps it applies more to extroverted subtypes in general, if at all.