Your corse is just that, the center of your body. Think of everything that falls between your hips and shoulders. That is a lot more than just your abdominal muscles. And having a strong core can benefit you in so many ways.
Better Balance and Coordination
A strong core can help you have better balance and more stability of movement. You will likely adapt better to any uneven or challenging terrain you encounter, which can also help lower your chance of falling and getting an injury.
Easier Everyday Movement
If you simply want to be able to better perform everyday tasks, things like housework, gardening, picking up your kids or grandkids, and going grocery shopping, then a stronger core can give you a boost. Increased comfort throughout movement can also help you reach your fitness goals quicker and more easily since you will be more likely to exercise.