Yes, because you probably already paid a fee in some way, it's just that you don't give this fee to the developers but to some Government institution... hence this is probably a disadvantage as well.
I don't see a purpose really (since you can use your mobile phone as "a physical thing", "wallet", call it how you want...) except as a little social experiment, mind game... "let's just issue everything the same way it is issued with FIAT money... it will help people adopt". However, I personally don't understand this mindset.... if you are switching to something new, then you should have already accepted that it is ...well... new...