[bccdee]

That's not true. You're stereotyping criminals. People who commit assault, petty robbery, public indecency, etc. are probably on the whole not brilliant. But how about fraud, embezzlement, or parking infractions?

Given that we're talking about cybercrime here, what are the odds that the criminals in question are too dumb to Google "how can i get around whatsapp image scanning"?

[loeg]

It's a general statement; there is always individual variation. It is also generally true of fraudsters and cybercriminals.