I suspect that your parent is conjecturing that the fact of not having X.com will eventually stop being perceived as a sign of weakness.
I do not know to which extent I agree. I find it sad but likely that people may eventually stop paying attention to URLs altogether; the main counter-argument I would have would be phishing, because, no matter what, you'll still have to check that you are on the right website at some point. That said I do believe that if it may happen for the general public, it may not happen before a long time for more knowledgeable people (prospective funders, employees, partners, etc., as you mentioned).
I do not know to which extent I agree. I find it sad but likely that people may eventually stop paying attention to URLs altogether; the main counter-argument I would have would be phishing, because, no matter what, you'll still have to check that you are on the right website at some point. That said I do believe that if it may happen for the general public, it may not happen before a long time for more knowledgeable people (prospective funders, employees, partners, etc., as you mentioned).