This makes the learning curve shorter. A novice can immediately participate in the sport. As you get into the sport you'll hear a lot of people talk about the dangers. Sea kayaking can be dangerous. However, most of the danger lies in not using your common sense.
Many people cross open bodies of water.
If anything goes wrong when you're 2 miles out, you could be in real trouble. A sea kayak has no engine, so you must rely on your own ability. This is the key, only take part in a trip that is at your level and ability. You are responsible for your own safety. Also, there are lots of safety devices, which you must be familiar with and have on you at all times.