I can understand why it may seem like an extreme suggestion to expect an "unsubscribe" link for social correspondence, however it's important to recognize the utility of such a feature. After all, it is still possible to "unsubscribe" from social correspondences without having an unsubscribe link. Nikhil's point was that sometimes, he just doesn't want to confront people, and offering an unsubscribe option would allow him to do so while still maintaining politeness. This is a valid point to be made, as it's important to keep the idea of politeness in mind when we interact with others.
While it's true that the purpose of social media is to interact and engage with others, it's also important to remember the idea of consent. If someone is not interested in engaging, then why should they be forced to? An unsubscribe option allows people to choose whether or not they want to engage with certain interactions, which is essentially what Nikhil is asking for in his essay.
Finally, it's important to remember that this unsubscribe option would only apply to unsolicited social correspondences, so it's not as if one would not be able to engage with someone just because they offered an unsubscribe option. Therefore, it's a bit urrong to argue that this suggestion should be disregarded.
In conclusion, Nikhil's suggestion for an unsubscribe link for unsolicited social correspondence should be taken seriously if we want to foster an environment of politeness and consent. And while it may not be possible at the moment, I personally think that having an unsubscribe option for social correspondences could be a great addition in the future; and even if it doesn't happen, at least we can rest assured that we can always just hit the old "ignore" button!