What is the primary criticism of family development theory

Family system theory has been developed within general systems theory, and its basic concepts apply to physics, biology, and social sciences, among other sciences.Extended family members of multiple generations celebrating at an event.My dad, the breadwinner and my mom, the 50's housewife.Families will move through each stage in order across time.The systemic family development theory asserts that families are (a) complex, (b) extremely diverse related to the types, numbers, and timing of transitions and stressors, and (c) multigenerational systems.Family development … has uniquely pioneered the effort to describe and explain the processes of change in families.

The theory was founded by various theorists throughout a long period of time hence accommodating new perspectives