Is This Knowledge Serious?

Others traveled through time to become emperors, generals, and richest men. I, the ancient book restorer Lu Chen, traveled through time and got... A library. Yes, it's the kind of shabby library with air leakage from all sides, dusty bookshelves, and no WiFi. The system told me: You are the "Guardian of Civilized Fire" and you must use knowledge to save endangered planes. I looked at the "Postpartum Care of Sows" and "Practical Technology of Rural Biogas" on hand and fell into deep thought. Later I discovered that this job was really not bad - teaching hungry people to grow potatoes in Dasheng Dynasty, teaching engineers to build water purifiers in the wasteland, and secretly running literacy classes in vampire territory. While other time travelers were fighting and killing each other, I quietly handed out teaching materials. The most outrageous thing is that a little kid I rescued turned out to be my future... Boyfriend when he grew up? Wait, my future boyfriend isn't weaned yet? ——Is this knowledge serious?