party_pants said:

I don’t think it would work.

The only thing that drives them off is the sound of orcas. But playing orca sounds might attract orcas, so probably not a solution.

The only sure solution is to have lakes onshore with artificial wave machines. Otherwise, in the open ocean you must just accept the risk.

How does the number of deaths from sharks compare with deaths from accidents while driving to the beach?

Never mind drowning.