That's just not true. Of course a profit-maximizing entity (which is an idealized abstraction that doesn't perfectly match anything in the real world) would 'love' an addictive product, or to minimize their costs, including an externalities for which they're liable, but, again, ideally, those same entities would absolutely prefer that their product does NOT in fact kill their customers or potential customers as that would just reduce their maximum potential profit.
Per your hyperbole, mass media is also engaging in 'mass murder for profit' as they cause people stress and stress likely shortens their lives. A tradeoff involving the potential loss of life or some period of life is not literally murder.
If you sold all of your possessions and lived a life of poverty you could donate the proceeds, and any income you earn that you don't strictly use to prolong your own life, to a charity that could save lives or lengthen others. That you do not, nor almost anyone else, is NOT literally the same as murder.