I think the point that the parent post is making is that while one can learn to be proficient in a certain topic, he/she can't call it "native" unless it is in fact, "native" in definition.
It's as much as you can't claim native to a specific country if you are not born/raised in that country.
No, that is not my point. My point is that the term "native" has a very narrow scope where, by definition, the skills must be learned or acquired from birth(and certainly before the critical period[7-10 years old] is over). In this sense, for example, many people can be native English speakers, but it means nothing with regards to their actual skill of speaking or writing English. That's my problem with asking for "digital natives". "Fluency" would be a better term to use, because it doesn't differentiate on when a person learned a skill, just their talent regarding that skill.
It's as much as you can't claim native to a specific country if you are not born/raised in that country.