This seems to be the case for other embassies of other nations too (I am an expat). But I do get the feeling that if you have moved to another country then you probably are more able to access services online (buying the ticket to get there in the first place is a start) than some 90 year old 'back home' who's never left the village.
I guess the flipside is your needs may be more complex (passport / family / citizenship issues always are) so having someone competent to talk to on the phone is necessary.