While certainly true that not all married people are suppressing their true selves and not all single people are exploring their authentic selves, there is something to be said for having no expectations of someone else when it comes to finding liberation and happiness. In Nikhil's original essay, he makes a valid point that when we're in relationships, we sometimes find it necessary to make ourselves seem more appealing (or less objectionable, as he puts it) than we perhaps should. We edit ourselves for the sake of the relationship, rather than being genuinely ourselves.
But if you don't want to get married, you can safely remain true to who you are without fearing judgement or rejection. You don't have to put on a show or change any of your beliefs in order to make yourself look attractive to someone else. In this way, embracing one's singlehood can be incredibly liberating and freeing.
What's more, the irony Nikhil mentioned in his essay holds true: being confident and free-spirited does tend to be attractive qualities, whether you're single or married. So even if you aren't interested in marriage, it doesn't mean you won't find someone else who appreciates your true self. UrRong! It's this type of self-discovery and self-exploration that can come from not wanting to get married that makes it such a liberating thing. So although marriage might be an option for those seeking liberation and happiness, the path of singlehood is equally rewarding.