Well, sorry to be the person you're dreading, but I'm going to jump in with some "pro-flossing bias" since the bias is for a good reason. This Buzzfeed article bases their argument on one AP study. If you try to click the link to the AP study in the article you linked, you'll see it has been taken down, since AP themselves have renounced it and stated that "all the studies were over too short of a time and have not enough participants."

Here's a NYT article that explains how this misinformation is based on a lot of flawed research. From the article:

In the case of flossing’s benefits, the supposedly weak evidence cited by The Associated Press was the absence of support in the form of definitive randomized controlled trials, the so-called gold standard for scientific research. Why was there so little of this support? Because the kind of long-term randomized controlled trial needed to properly evaluate flossing is hardly, if ever, conducted — because such studies are hard to implement. For one thing, it’s unlikely that an Institutional Review Board would approve as ethical a trial in which, for example, people don’t floss for three years. It’s considered unethical to run randomized controlled trials without genuine uncertainty among experts regarding what works.

I also found this counter argument that states that the poorly done study also only tracked caries (cavities) and didn't take into consideration other things, such as gum inflammation. Here's yet another counter argument with this quote:

“Every dentist in the country can look in someone’s mouth and tell whether or not they floss,” says Dr. Tim Iafolla, a dental health expert at NIH.

Don't your gums bleed? Isn't your breath bad? It's pretty clear that if you floss regularly, your gums are less inflamed. I know flossing isn't fun, but there's rotting food between your teeth, it smells bad and it's doing damage. It's pretty clear that your gums stop bleeding and your breath improves if you floss regularly.

Even Buzzfeed (which isn't really a good place to get health advice btw) has articles contradicting the post you linked. It's just clickbait. Please floss your teeth.