Honestly I watch the netorare scene because of the potential revelations about the story we might garner from them.
Also because some of them make use of extremely clever chekhov's guns. Like, in the Catherine Robot Bad Ending, Hunter very specifically lets her ride his face telling her he's gona let her do something to him he never let her do before, which leads to his neck snapping due to her powerful thighs, which has been foreshadowed for chapters before. At the same time, it's also revelaed how Hunter faked his death in europe and was seeemingly being hunted down by the Interpol, among other things, which allows you to piece the pieces together for the overhall plot too.
Not watching the NTR ending doesn't let you see this, but to each their own.