When they refer to "spiritual goals" they are actually referring to organizational goals. Any spiritual goals you set are personal goals, designed to improve your relationship with god. The WTS wants to dictate your spiritual goals to you, and those amount to becoming a company drone.
To the WTS, a spiritual goal would be something like becoming an MS or pioneer. Attending all meetings and commenting from the literature. Reading the literature as soon as it is available. Ancilliary goals would be avoiding higher education, getting a job instead of a career, being a good housewife, making sure the society always looks good, and so on.