What @Inna0 says is correct - hosts can, and do, change all sorts of details on their profiles, all the time. It's common practice amongst certain sectors of the "host base", particularly those with multiple accounts and multiple profiles. Indeed, Airbnb allows its own employees to do it all the time. Very often, when Airbnb staffers are travelling for work, they appear to switch profiles on a whim - I've seen many, many examples of heavily-reviewed employee profiles, with the reviews referring to up to 10 different names as the "booking guest"
As for transferring an account to another person being a violation of Airbnb's terms of service - like so many of the other restrictive, oppressive policies and practices that regular hosts are bound by - this is also subject to the subclause "...unless authorized by Airbnb", which features liberally throughout the entire document. Which means of course, that the T&Cs are selectively applied, and exemptions are selectively granted, depending on who/what you are, and how much you're bringing to Airbnb's table.
One rule for one, one rule for another.