Here is Daisuke Inoue, the inventor of karaoke. He chose not to patent the machine because he wanted to "teach the world to sing" and never regretted it, despite the billion dollar industry his machine birthed. Photo of him and the very first karaoke machine ever made.
Clint Smith l've said this before, but one of the only reasons I'm a writer is because I had a teacher in grade who looked at my poem about clouds & said "you can be a writer when you grow up." It stayed forever. Teachers, don't underestimate what your words can do for your students