Because forcing people to use anti virus spam filters is a way to spy legally on other people whilst getting paid for that spying without a shred of proof that

Because forcing people to use anti virus spam filters is a way to spy legally on other people whilst getting paid for that spying without a shred of proof that someone is spying on you! Ask yourself this, why doesnt email readers come up with a standalone built into way to reduce or shutdown the attack vector of antivirus and resource burn of spam filters?