There’s no surprise that during that era there were men (Roman Soldiers) that were over 6 foot tall.
Yes someone wrote the article in the modern journalistic inflammatory style. Long on hyperbole & exaggeration short on factual information. Title written purely to catch your intention.
Not to mention, men in the highlands ran large. A fellow 6' tall was probably just average. So if your men are in northern England and pushing further north, better bring your big.