It costs 150 usd to send 5k usd between two countries I live in.

It costs the same amount of money to literally go there by plane and bring it as cash. This is not fair obviously. So traditional finance is a scam itself.

It takes 10 seconds and no fees to make the same transfer via blockchain.

I am pretty sure you know basically nothing about those crimes or the people that do crimes or how they actually transfer money. Just doing casual newspaper intellectualism while talking about things you never interacted with