It was explained to me that big companies can't simply copy ideas/concepts. Example: They ask for an expose of work and then don't hire the original artist but

It was explained to me that big companies can't simply copy ideas/concepts. Example: They ask for an expose of work and then don't hire the original artist but reproduce it inhouse. Also think publishers or even Hollywood: Scripts are advertised by their authors to many producer (like the proverbial taxi driver who tells every prominent passenger of his movie idea) but this only can work if manuscripts are protected. The other example is something like GNU: If you kill copyright the GNU Public license would cease to exist.