I think there is a very small overlap in the Venn diagram of (a) people who’ll know the difference between 2700 and 2750 or even how to look up a fide rating (b) people who don’t already just know who Nakamura is directly and what value his takes have (for better and for worse) regardless of how his rating changes over the next few years.

In other words, while Hikaru has a huge amount of total chess beginners watching his streams - and while “admiration of mastery” is probably the core tenet of what makes Hikaru streams successful - I think most of his total novice, barely understand chess viewers are just enjoying it in a “_wow, man do thing goooood_”, and maybe feel he’s legitimised by being a “_super grand master_” wherever that is. They don’t look at his rating and think “apparently this guy is the best of the best” - they look at him play, seemingly effortlessly, and ungodly quickly and win constantly.

And the rest, who understand chess to some degree - would just know who he is regardless and don’t depend on his rating to tell them he knows chess.