I think there's another option that hasn't been covered yet, that things get exaggerated in the retelling. This is certainly true of biblical stories,

Quote

Goliath’s height

Goliath grew at the hand of narrators or scribes: the oldest manuscripts - the Dead Sea Scrolls text of Samuel, the first-century historian Josephus, and the fourth century Septuagint manuscripts - all give his height as “four cubits and a span”, about six feet, nine inches tall, but later manuscripts increase this to “six cubits and a span,” which would make him almost ten feet tall

The other claim for giant tribes don't exist in the Hebrew bible, but come into their own in later editions spawned by the mistranslations in the KJV (Anakin, Rephaim, Nephilim etc), the only mentions of a giant in the original text are all references to Goliath and his sons, there are only three of them
[www.google.com]

So giants, real ones, show me the bones, not the associated literature, its really just anecdotal evidence at best and at worse, political, fabricated or imaginative story telling