Similarly, you may ask, why sport bikes are better than cruisers?
Sport bikes are great in the twisty bits. They corner well, they accelerate quickly, and they brake quickly. They're lighter than cruisers of the same displacement and have a much better power/weight ratio.
Subsequently, question is, what is the difference between a sports bike and a cruiser? The short of it is that cruisers are street bikes and offer a spread-eagled riding position while sport bikes are made for sport riding, and tend to be less comfortable or enjoyable as street bikes. Putting aside styling cues, the major difference between the two is the motor. Sport bikes look like MotoGP replicas.
Simply so, are sport bikes safer than cruisers?
A sport/standard will turn sharper and brake harder than a cruiser. But in the experienced riders course, I saw people doing emergency avoidance on giant cruisers – and they were able to really lean the bike over hard and fast. With that, you'll be safe, without that, no bike will save you.
Are cruisers easier to ride?
Comfortable to ride, cruisers can also make for good touring bikes with the addition of saddlebags, a windscreen, and maybe a backrest for the passenger. A light- or medium-weight cruiser makes a good beginner bike because they are easier to handle at low speeds and have a more relaxed power output.