Do you think marketing is the most effective way of achieving it?
And do you think the trillion dollar marketing industry that exists is really creating trillions of dollars of value for consumers?
2) Whether marketing is the most effective way -- depends on the product/service and on the audience.
3) Yes, generally trillion dollar industry - really creates over trillion dollars value for consumers.
If it was not the case - consumers would not use it.
Consumers don't use it, producers do, and consumers have no choice about that.
What value does the consumer get out of it that justifies the producer spending billions on advertising?