His classmates did give good answers, and he was pretty much convinced by it. However, if he was to invent something, he would probably come up with something that is not of total necessity. Bertie Bott didn't actually create candy because it simply had to be consumed regularly...nor was it a necessity. He did it out of passion for confectionery, right?

Tilting his head to the side, Jace tapped his finger on his lap as he tried to catch that one single thought that would, hopefully, cover all the answers mentioned.

Hmm.

"I think it's not just inventing based on necessity, professor. Probably inventors would also consider ideas that are timeless. Something that will not go out of fashion..." he said with his hand in the air.

And yes, funding. That too, of course. Very important factor.