Omega-6 is the fat you almost certainly aren't short on, and that's the whole point of the page. It's essential, so you do need some, but it's abundant in modern diets rather than scarce.
The reason is where it lives: omega-6 is the main fat in most vegetable and seed oils, which puts it in a huge range of everyday food, from cooking oils to packaged snacks, fried food, and baked goods. For most people the supply is more than sufficient without any effort.
So the useful goal isn't more, it's balance. Most people's intake skews heavily toward omega-6 simply because it's everywhere, while omega-3 stays scarce, and the sensible aim is to narrow that gap, mainly by getting enough omega-3 rather than by treating omega-6 as something to fear. On a roughly 2,000-calorie day, adequate intake is around 15 g, which a typical diet reaches easily. There's no established upper limit set for it.