Ships accidentally running into bridges is a fairly common event. Most of the newer bridges have a diamond of protective rubber barriers surrounding the supports. And all ports will typically have tug boats to guide them past a certain point.

However, those are typically kept in or near the actual port, and probably take a while to get anywhere far from shore. This is probably at some level a fault of the ship and their crew. It could be a failure to keep their equipment in working order, but the majority of near port collisions are due to ships not following or knowing the ports guidelines on speed or navigation.

I find it a bit odd that they would blame it on losing power, but they still managed to hit it head on with enough speed to knock it over.

Not sure of the specific circumstances, but a ship in the water, even with all motors off, doesn't sit still unless you drop the anchor, and even then it can swing on the chain. It would drift with the current, and it would have momentum from wherever it was headed before the power cut out. Unlike a car with brakes. Even if they had power and slammed the engine into reverse, it's not instantaneous. There's just too much mass and not enough friction.

If it has no power, then it can't detect anything. It's like a driver falling asleep

Yes, it shouldn't happen and something clearly went horribly wrong, but well, the one asleep at the wheel isn't going to be detecting things