Family- with special child

When one have some special kid (medically compromised in any way)in ones family.what is their responsibility towards that child?It wasn’t the mistake of that child to be born like that way.He /she too deserves the best life .But with time that kid becomes burden for family members,if not for all but but for some. We come across many inspiring stories that person with disability becomes IAS officer ,CEO etc .But at the same time u get to know about some left them because they feel them as burden.Is it so difficult to inspire motivate them to become as equal and respectable like others.Can’t one can think for a seconds that when they were kid ,not able to express,speak to their moms bear all their tantrums and took care of them.Then why the grown up child cant’s take care ,responsibility of that special child in their home to make them feel they can accomplished things in life too. Some just turned off and becomes selfish and self oriented.They even don’t ask for money other than mentally support.they don’t have any fault of being that way.Its people perception for them , is a fault.They are not disabled guys,they are just abled personality with some some special abilty.They deserve to be like one among us.