If you think we can control parasites you have not the slightest clue about the natural world.
According to you I don't have the slightest idea about much. We will be able to control parasites in the future. We control everything then because we can intricately manipulate the atom. Right now ,we are just a baked potato in the oven. That's why Revelation says this:
Revelation 3 - 11 I am coming soon. Hold on to what you have, so that no one will take your crown. 12 The one who is victorious I will make a pillar in the temple of my God. Never again will they leave it. I will write on them the name of my God and the name of the city of my God, the new Jerusalem, which is coming down out of heaven from my God; and I will also write on them my new name. 13 Whoever has ears, let them hear what the Spirit says to the churches.
We have to guard ourselves against people who take our "crown." God doesn't hold our hands like all the atheists require for him to be real. The famous Witness verse is also evidence of God's plan for humankind in general:
Matthew 24 - 45 “Who then is the faithful and wise servant, whom the master has put in charge of the servants in his household to give them their food at the proper time?
While we wait we just try do the best we can with the tools available. When God decides to show himself, the stewardship of the human mind and the planet will not be in question.
2 Timothy is also interesting in regards to how God, according to Paul, would like us to be:
2 Timothy - 15 Do your best to present yourself to God as one approved, a worker who does not need to be ashamed and who correctly handles the word of truth.
-Sab