According to a quick search and reporting due to this event, apparently a quick number is a few dozen full collapses in the past 55 years, which doesn't seem to

According to a quick search and reporting due to this event, apparently a quick number is a few dozen full collapses in the past 55 years, which doesn't seem to account for impacts and collisions that didn't result in full collapses. So that seems like a lot of bridges indeed, along with a lot of deaths and economic impact. The reason why I would anticipate a container ship hitting that bridge is because of the video we've all seen. It's a huge ship that is going the slowest it can while still retaining control over the vehicle, unattended, through a tight spot, close to a bridge with zero protection from ship collisions, and all with a ship design that is apparently (according to other comments) effectively impossible to correctly maintain and keep running at all times. So I think the better question is, why wouldn't you anticipate a collision?