That article is a literal an advertisement for a particular brand of wine. I hope you got some samples, because the writer is certainly getting paid.
It's also misleading about really easy things to look up facts. Only fortified wine like sherry or port gets up to 20%.
As an analogy, I guess I'm not strictly lying if I said I make in between 50 and 100k a year, even if I never made more than 80k... it's still technically in between those numbers.
Actually I take that back: "The majority of wine you may find at restaurants, vineyards, or on the shelves of your liquor or grocery stores is on upwards of 20% or more alcohol content." is just a lie.
It's mostly between 12 and 16%.
If your only source for a fact is something trying to sell you a product marketing it on it's distinction to the norm, check their claims.