The person you replied to is pretty much right, Estonian ID-card has solved 99.99% of authentication and signing problems for it's citizens, the support is mandated by law and very widespread. There are a few flaws but those are minor compared to the softly put clusterfuck rest of the world is dealing with.
I support such uses of smartcards, but we have to be disciplined regarding our assumptions about non-repudiation.
Of course we have to be disciplined, but other things can't even remotely reach the security such a solution provides. Your comment has very FUD-y undertones, rising concern about a very minor thing if you actually look at how much it solves and how much better it is compared to other widespread applications.