Metal plate beneath Linothorakes or Spolades

[rocktupac]

In all fairness, glued linen armor (about 1cm thick) outperforms quilted linen, quilted and stuffed linen.

Using that logic, since silk outperforms linen, the Greeks didn't use linen at all but silk to make their armour.

No, using that logic glued linen is superior to quilted linen and quilted & stuffed linen. That's all.

Using your logic, since 5 inch thick steel outperforms silk, the Greeks didn't use silk at all but 5 inch thick steel to make their armor.