Absolutely not.

Early in my career I worked for a pharmaceutical giant as a statistician. One of the things we would work on was trying to determine how much the various advertising efforts the company did actually moved the needle. Every year was the same miserable experience. The company would spend millions and millions of dollars in various advertising channels. We would attempt to determine how effective it was, but the wayin which they advertised and the way we collected data made it very difficult to generate any kind of insight at all. We would make recommendations as to how to adjust execution moving forward to ensure we could reliably determine how much value we were getting out of these campaigns, all of which would be ignored. They would massage our findings to tell whatever story they needed and would do the same thing the next year.

The marketing division is its own organization, with their own incentives that don’t necessarily align with the broader company’s incentives. They also were heavily addicted to relying on external analytical consultants who could pump out all the slide decks and pie charts they wanted, which would inevitably show that the marketing was not only effective, but should be invested in more the following year.

Pharmaceuticals is an extremely specific example here. Anyone can buy a Coke.