Being a teenager is difficult enough. Your body is growing. What looked good on you as a child no longer fits. You are highly self-conscious and are still finding your way when it comes to clothing.
Everyone's body is different. What suits a particular body shape does not suit another. Applying a one-style-fits-all approach with a school uniform will inevitably create feelings of embarrassment and discomfort for some segments of the population. This is unpleasant for some students and downright torture for others. Consider a teenage transgender student who knows that skirts, dresses and blouses make them feel uncomfortable. Forcing these students to wear a school uniform is cruel and can have significant impacts on their self-esteem. One study carried out at Arizona State University confirmed this. It found that students from school without a school uniform policy had a higher self-perception than those from schools which forced students to wear uniforms.
Because uniforms reduce bullying and teasing based on fashion choices, indirectly, they contribute to increasing students self-esteem. A study from Oxford Brookes University among year 7 and year 9 students found students reported heightened feelings of anxiety on non-uniform days. This indicates that far from damaging students' mental health, school uniforms actually have a positive impact on students psychological welfare.
[P1] Not everyone feels comfortable in the same types of clothes. [P2] Forcing these people to wear a generic uniform will make them feel anxious. [P3] Students should not be required to wear a uniform.
[Rejecting P2] But others get anxiety about having to choose their own clothes. [Rejecting P3] Both options give students anxiety. It is school. People are going through puberty. Everyone is anxious all the time.