Yes, I agree with this point. It's essentially implied by what I said in post #392. It is certainly more true of ESPs, as their "taking up of" Se and suppression of Ni is higher than ISPs, who "take up" Se and suppress Ni less, and will tend to reconcile the two earlier in life.
My statement implies that that is one relationship between Se and Ni; it does not imply that it's the exclusive one.
Each person has their particular manifestation for how these "functions" manifest, but, like most things, these unique manifestations often tend to share some qualities/characteristics, and end up being able to be grouped together, in some way.
One of the ways that "opposite" functions (in the Ni/Se sense) tend to manifest is in conflict with one another. In fact, this is sort of their "default state", from which we can grow and change and move away from this relationship between the two, which is the process of differentiation, integration, and, ultimately, individuation. But, often times, even if we've learned to become aware/conscious of how we suppress our tertiary and/or inferior, and have learned that suppressing these functions actually often creates a certain weakness within us, and have learned to stop suppressing, and instead take up, to some degree, these less-differentiated functions, we still will often have some degree (even if very light) of a contentious relationship with them, as our first two functions are still our dominant mode of being in the world (granted, this can change a bit if one falls into tertiary temptation/one's dominant loop). If you wanted, you could quantify how "contentious" (this isn't a perfect word, but it gets the job done -- there are other ways that our suppression of these functions manifest other than contentiousness, but contentiousness is one of the highly common ones) of a relationship one has with one's tertiary and one's inferior on a scale of 0-100 -- with 0 meaning absolutely no contention and only completely healthy/cooperative interaction, and 100 meaning absolutely contentious/at battle with one another, with extreme suppression and spite for that other mode of consciousness -- and this number would probably fluctuate over time, with healthier, more developed individuals being closer to 0 for both their tertiary and inferior (not to mention their shadow functions), and less healthy, less developed individuals being closer to 100.