What are the the weaknesses of the developmental approach in psychology?

Many approaches centre on the progression from birth to adulthood in development, but the challenge lies in the fluid and subjective nature of this process, particularly in defining maturity. Biological factors, including physical features like beards and breasts, contribute to varying perceptions of maturity. Genetic makeup can lead to premature hair loss in young individuals, creating discrepancies between appearance and actual maturity. Additionally, intellectual ability (IQ) adds complexity, with instances of high IQ in young children and low IQ in older individuals challenging conventional expectations. Consequently, developmental psychology's focus on constructs like maturity and IQ is debatable and introduces weaknesses to the field. check the channel by Dr T, called Life in its fullness on YouTube for more information about this.