Yes, but events like this further erode confidence in the average investor.
No disagreement there. But I feel like it's mostly because of media spin... it's the headline on all news sites at the moment, and a lot of them make it sound like Average Joe isn't able to trade any "NYSE stocks" right now (I bet most of the journalists actually think this is the case, unfortunately).
In reality with the multiple marketplace structure, single venue outages occur occasionally to little fanfare. Certain groups of stocks have outages on NYSE all the time (in fact, at the open this morning) and no one knows/cares. It's just a nice headline story "NYSE IS DOWN" for easy clicks.