What best explains why few cases receive individual treatment?

Few cases receive individual treatment primarily due to limited resources, such as time and funding, which can constrain the ability of professionals to provide personalized care. Additionally, standardized treatment protocols are often used to ensure efficiency and consistency in outcomes, making it challenging to tailor approaches for every individual. Finally, systemic factors, including high caseloads and administrative pressures, can further limit the capacity for individualized attention in many fields, including healthcare and social services.