An interesting thing yesterday. As I was perusing the Void Elf wowpedia page, I see they updated it to include that interview with Moorgard/Steve Danuser. Frankly, it seems even Wowpedia doesn't believe that interview means Void Elves are able to turn others.
Here is what Wowpedia's interpretation is of that interview point (at the time of this post):
"The void elves are not recruiting, but they are open to those who share similar interests. Their research has attracted other elves to Telogrus, with both Silvermoon scholars and high elven wayfarers arriving to study the ways of the Void. They are trying to find out if they can reproduce the original process that transformed the void elves.[12]"
https://wow.gamepedia.com/Void_elf
Another thing I noticed is in their introduction of Void Elves at the top of the page. It used to say something like "Void Elves are blood elves and high elves" and it doesn't include that anymore. Just says Void-infused elves. It appears that the more we're learning about the Void Elves. The more they're simply Blood Elves turned Void, and less appear to have a connection to High Elves.