Imagine a conversation from ancient times...
Alex: Huh, ever notice how wood floats?Beth: Yep. Sure did notice that.Alex: You ever wonder why it floats though?Beth: God done do it.Alex: Yeah I guess you are right. Why did he make it like that though?Beth: Oh, uhh... I don't know. Wait, I got it! He made it like that so we could build structures from wood to help us cross water!*Wooden ships invented*
Many years later...
Charlie: These wooden ships are nice and all but I would like something a bit harder like rock or metal. That would be nice.Daisy: Yeah but rocks and metal don't float, stupid. God done only made wood float.Charlie: yeah you are right.
Meanwhile on the other side of the world...
Edward: These wooden ships are nice and all but I would like something a bit harder like rock or metal. That would be nice.Fred: Yeah but rocks and metal don't float, stupid. God done only made wood float.Edward: I'm not convinced. There has to be more to it than that. I'm going to look into this further.Fred: You are just wasting your time. The answer is god done do it. Quit yer yammering and help me build this ship.Edward: Well I have some experiments here showing that the reason wood floats is because it is less dense. I knew there was more to it!Fred: God done did it less dense so it could float so we could make ships. No need to look further.Edward: I wonder why less dense things float though. What causes that to happen?Fred: God done causes it to happen so that we can make ships. Stop questioning things.Edward: But I have some new experiments that show that the reason less dense objects float is because the water pressure exerted on an object is affected by volume and the gravitational forces exerted on an object is affected by mass. Therefore due to the relationship between mass, volume, and density the water pressure exerted on less dense objects overcomes the gravitational forces. That is what causes wood to float! What a remarkable discovery!*Buoyancy discovered*Fred: I don't understand all yer fancy talk but really it ain't all that impressive. God done planned this buoyancy thing from the get-go so that wood could float so that we could make wooden ships. What a waste of time. How does knowing about this buoyancy thing help us?Edward: That does make sense. Maybe I should just give up.Fred: Of course it makes sense. God wants wooden ships. How he makes the wood float don't matter none.Edward: Wait, I just had a thought! If we were to make a ship from steel that had enough empty space inside it to reduce the effective density to less than that of water then we could have a ship made of steel! This is going to change everything!Fred: Uhh steel don't float, dummy. Steel sinks. Remember that steel nail I dropped in the water and hour ago? It sunk. Don't matter why it sunk, God just done made it so that steel sinks.Edward: But it all makes sense now. The reason things float is because of their density, the reason less dense things float is because of buoyancy, we can make buoyancy work to make a steel ship float!*Steel ships invented*Fred: I don't understand any of that jibber jabber but I tell you what, if you can make a steel ship float it's because god gone did whatever density-buoyancy hocus-pocus just for us so that we can make steel ships. You should just leave it at that. All yer investigatin' and experimentin' and what has it gotten us? Nothin'.
Edward was able to invent something new because when he had a question for which he did not know the answer he said "I don't know, let's find out." as opposed to Alex, Beth, Charlie, Daisy, and Fred who all responded to unknowns by saying "God". Even when there was no obvious immediate practical application to the investigation continuing on led to positive practical results.