Genuinely curious - how does one begin to answer such a broad question? The parent comment is reasonable. It is easy for carriers to let users keep their number

Genuinely curious - how does one begin to answer such a broad question? The parent comment is reasonable. It is easy for carriers to let users keep their number. It isn’t going to eat into their profits, so why not do it? Especially when bank accounts, two factor authentication and a bunch of other stuff are tied to your phone number. Or are you of the opinion that profits matter over everything else?