Let's Encrypt is a nonprofit Certificate Authority providing TLS certificates to 300 million websites. A Certificate Authority really has no way effect way to validate where a website is a scam or not; Let’s Encrypt offers Domain Validation (DV) certificates and can validate the Domain Name but not its contents.
Understood, but a non-profit organization helping criminal organizations renew their certificate at expiration does not make sense to me.
Let me explain in another way: it's like letsencrypt being a free taxi waiting for a thief to run away after attacking an old lady in front of everybody in the street and the driver being aware about it but not his problem.