What are these industries trying to tell us? Are they depicting the representation of roles in society we are to play?

Both your question and your suggested answer are invalid, as based on the fallacy of collectivism.

"Industries" aren't trying to tell us anything. It's just an *abstract* *generalisation* that does not refer to *any* decision-making entity. Okay? Got that?

An industry is comprised of all the people who have anything to do with it.

Just think what that means in terms of the actual people you are talking about, reflect that it is factually false to imagine them as some kind of monolithic decision-making agent, and you will see that such a confused and illogical question can only give a confused and illogical result.

But it's worse than that. Your teacher has started at the conclusion they want to reach, and then thought they were clever by working backwards to the stupid and confused question that they think will give that foregone conclusion. That's why they asked a leading question - one that suggested an answer.

Individual human beings - not "industries" - produce music videos, working in hundreds of different roles. They do it because they expect the advantages will outweigh the disadvantages in each individual case. And if it does, it will be only because other members of society value what they produce, above the price they have to pay to get it.

That's it.

The rest is garble-yarp of academics indulging the fallacy of conceptual realism.