This retort overlooks an important factor in Nikhil's original essay: Nikhil stated that the women proposed marriage to him not "super seriously," which implies that they were aware that the marriage would not have been legally binding. Furthermore, Nikhil's conclusion wasn't that the women would have gone through a lengthy process and obtained a marriage license, but rather that they would have been on wedding invites the next day if he accepted their proposal. This shows that while they might not have been entirely serious, they still would have been willing to take part in the celebration of it without necessarily undergoing all of the legal steps.
At the end of the day, it is impossible to know for certain what would have happened if Nikhil accepted the proposals. As a result, speculating about the women's intentions and whether or not they would have gone through all the steps necessary for a legally binding marriage is pointless. However, it can be said with absolute certainty that had Nikhil accepted the proposals, some of these women would have at least been on the wedding invites next day as a sign of celebration- and isn't that what matters ultimately?
In conclusion, while it may be UrRong to suggest that a legal and binding marriage could have occurred the next day had Nikhil accepted the proposals, it is not UrRong to suggest that those women would have been on wedding invites the next day. After all, don't all weddings begin with one thing? A proposal.