Watch a few Jim Browning vids on YT or some of the other scammbaiter calls and you will understand better. People are mailing these guys 20k in cash in fedex boxes. Then mules here in the US pick it up at an airbnb/hotel/whatever (they hang around and wait for the truck to show up and claim it), take it home take a small cut and wire the rest along up the chain. You get a couple of those and it pays the whole call center for a few months... They estimate the straight out scams are around 20 billion a year. The quasi 'legal' 'cold call' stuff is probably much higher.

They are targeting older people who maybe let their spouse take everything and that spouse is dead.