Bitcoin is a public ledger. I dont understand how a zero-privacy blockchain would be the biggest enabler of ransomware? Isnt TCP/IP a bigger enabler? SHA-256 c

Bitcoin is a public ledger. I dont understand how a zero-privacy blockchain would be the biggest enabler of ransomware? Isnt TCP/IP a bigger enabler? SHA-256 came out of the NSA. Didnt the FBI retrieve the Bitcoin from the pipeline ransomware attack? They have lots of tradecraft at their disposal that we cannot know of.