The disease effects a small number of people (1 in 4000), and doesn’t cause complete blindness in all those effected.
It’s delivered in a viral vector, kind of not so easy to do yourselves I’d guess. Probably the easiest way would be to get hold of some and culture the virus yourself? Then just make as much as you want.
Still injecting something made without strict QC into your eye might not be so appealing.
You want to be putting enterprise-grade things into your eye. The only way you'd be able to guarantee that is to source the treatment through traditional channels.
The kit looks fun, but I don’t think it as (easily) be used to replicate this work, it’s just too different.
The issues mentioned in the article also apply.