Practical Approach on Resource and Cost Loading a Project Schedule

Does every project schedule need to be resource and cost loaded? The concept of resource and cost loading a project schedule could be mystifying for some. Being able to identify the proper level of resource and cost loading a schedule proportional to the scope of a project can also be challenging. Furthermore, managing stakeholders that are not educated in project controls can get confused with the terminology, i.e., what is the difference between resource loading vs. cost loading?