People do not take precautions often when it comes to the foundations of their homes. Repair is very important when there is a problem because if neglected it could crumble and collapse the whole house.
Even if the basic problem that seems really small, it should be repaired as soon as possible for you to keep the original quality and strength. You can also hire a certified and professional contractor to fix foundation cracks via https://americanwi.com/settling-basements-foundations/
When it starts to crack it does not mean that you are doing something wrong as far as the maintenance of home runs per say. It could be that the people who built the house lays the foundation is wrong because it is not level.
If you do not take care of your basic in the sense that you let it get wet from the rain because your gutter is full then it is a different story. You need to check your base if you do not have gutters or if your gutters are not maintained. It really can ruin your whole house.
Molding and siding of your house would rot first. That means that you will have warped wood does not attract that animals can live in and can even begin to smell.
You can disrupt the solid foundation you out by letting you side with porous concrete to get full of water to soak everything up and then dry out and soak it up and dry and so on until eventually lose strength and crack or crumble.