My heart just skipped a beat

I was in the middle of a job application that asked you to fill a portion on disabilities. I scrolled quickly past then stopped and scrolled back up... My heart skipped a beat, or maybe it stopped, but I'm pretty sure I'm having palpitations currently. Do you see what I see?

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You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Disabilities include, but are not limited to:

Blindness Deafness Cancer Diabetes Epilepsy

Autism Cerebral palsy HIV/AIDS Schizophrenia Muscular dystrophy

Bipolar disorder Major depression Multiple Sclerosis (MS) Missing limbs or partially missing limbs

Post-traumatic stress disorder (PTSD) Obsessive compulsive disorder Impairments requiring the use of a wheelchair Intellectual disability (previously called mental retardation)

I'm not sure I understand how "Missing limbs or partially missing limbs" is considered a disability. How does this "substantially limits a major life activity"?  My heart is aching for my daughter. How is she limited? There is not a single thing that she hasn't been able to do yet. She does everything every other 5 1/2 year old little girl does. It doesn't "limit" her life or her activities in the slightest. This stopped me in my tracks. It crushed me to my core. I still can't understand this...