Even things we know for certain aren't "safe to consume" are harmless at small enough doses. If I drink chlorine at 1000 PPM it's going to kill me, but drinking it at 1 PPM (roughly the amount added to drinking water in many places, and well below the level in swimming pools) is considered harmless to humans and kills pathogens, so it's a net positive. It's possible that chlorine at 1 PPM causes cancer, but that's a claim that would require evidence.

The same argument applies to pesticide or any other substance. Without talking about specific numbers, it's just speculation.