Thread - Crafting material imbalance or WAI

Materials collected after last update and crafting changes. And i have dumbed already some materials which i had ridiculous amounts.
But one material is more rare or less gained than the others.
Thread, is this made on purpose or only gained by looting boxes?

I do craft time to time some standard and advanced first aid kits, but those only consume minimal amounts of thread. (WAI = working as intended)