> Most advertisers are honest players in the game with real products or services to offer to users

Yeah, but

> trying to find ways to maximize the impression, click-through and conversion rate by optimizing their creatives, targeting, and bidding strategies etc

Rapidly turns them malicious and anti-human, preying on psychological bugs.

> End result is many dodgy ads keep slipping through the policy filters.

Therefore their platform / process is not fit for purpose, no advertising platform has effectively solved scaling.