I agree with this.
I would add that a VN is an excellent fit for taboo fetishes because the story takes such a central role.
An "incest" porn video, is about two people pretending to be family even though they are clearly not (even interracial incest porn seems to exist...

) and they spend about 5 minutes to try and sell you the taboo, and finally the rest of the video is vanilla sex.
NTR video's, I'm not sure if that exists, but cuckold porn is generally about a guy crying in the corner with his clothes on while the woman and the black are fucking.
Both examples come down to bad acting, bad casting and a complete lack of story. All of that is easily solved in a VN.
The only video I ever saw where I saw real jealousy is this one:
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But I think that this monkey brain explanation of NTR is just psychobabble.
Besides, I think that the entire alpha-beta male thing has been thoroughly discredited.