Lasik doesn't fix blindness. If Lasik can help, most people live with corrective lenses, because they are much much cheaper even over the long haul than Lasik.
I certainly disagree with going to social media over the exchange, but Lasik is far from a "need" for anyone and isn't something to consider equivalent to "curing blindness"
Lasik isn't some life saving critical operation that would be provided for if she lived in a leftist European state, you make do with contacts or glasses until you can afford it. The parent is a dumbass too for running to twitter with this but it is an elective.