I never took such arguments seriously myself until my bank refused service to me without giving me any reason for it. Treating honest customers like criminals is exactly how people start distrusting centralized systems and their untrustworthy authority. In the dns/icann sphere there are also countless factors[0] that are evidence of this, not even talking about the dns hacks[1] or clear cut corruption of icann or censorship attempts.[2]
So it's not only about robustness vs efficiency, but also about additional factors like ownership and freedom + security et cetera.
[0] https://www.politico.com/news/2022/04/09/website-domain-more...
[1] https://threatpost.com/unprecedented-dns-hijacking-attacks-l...
[2] https://arstechnica.com/tech-policy/2022/03/ukraine-wants-ru...