You'd be singing a different tune if you were an Indo and had the means and $ to take a flight to Singapore and you were worried that you or a family member had caught the virus.
Those Indonesians who seek diagnosis in Singapore because they don't trust their own government have sons and daughters that mean everything to them too. They are humans with human emotions just like yours. Paternal instincts are universal.
If you had a loved one that you thought might need treatment would you be so altruistic as to sacrifice the life of your child by staying put instead of hopping on a plane to seek treatment?