Burden

Parents who had special needs children often heard people (relatives, strangers on the streets) tell us that our children with their limitations are "a burden". These people see the kids as a "financial burden" or "disrupting the normalcy of lives" or and "restrict parents from living life to the fullest". 

Really? Are special needs kids a burden?  If we use these people definition of 'burden', a healthy child can also be a 'burden'. 

Healthy children may not be successful in life, and may not provide a 'return-of-investment' to the parents; is the healthy child then a financial burden? Healthy children also requires the parents' time and love for nurturing, and parents often have to give up part of their life (career, personal time, social time); is the healthy child then "disrupting the normalcy of lives" and "restrict parents from living life to the fullest"?

In fact, using that kind of definition, sick and old adults are also 'burdens'.  I don't think I have to elaborate more on the difficulty of taking care of Alzheimer's patients.

What is the yard stick that you use to evaluate people's life? How do you measure the worth of a person?

Your yardstick reveal your heart.