I do see what you are trying to say. I had the same issue happen to me on GW1. After 6 years I was finally hacked. Thing was, I rarely played. I mainly logged in and did the holiday events and that was about it. 4 month of no logging in, I finally did and found everything of value gone. Of course Anet blamed me PC, fair enough its possible. But I had two account and the second account still had not been touched. All it had on it was random items and a ton of plat. So if my PC was infected, why did they not take that stuff as well?
My point is, it can happen. But be happy that you got a roll back. In my case all I got was and emote to promote one of their other games.
Though you should check your PC anyway just to be sure. i do stand with Anet on the one rollback. If they roll back every account that gets “hacked” then they are creating gold and items and will ruin the in game economy. Not to mention that there are those that would take advantage of it if they offered it more than once.
In a game less than a year old I’d had secured my account and PC and kept the 400 gold the hackers left on it. In the case I had with GW1, if the offered rollbacks, I’d had taken them up on it and saved 6 years of playing time. from the sounds of it, you still had your characters, so the 400 gold could have come close to replacing the items lost.
Good luck to you. Do scan your system, a day or two of scanning time is worth it anyways.