Other products don't aren't optimized by their creators to extract the maximum revenue from the 0.046% of their market that the creators have determined are vulnerable to remarkably effective psychological manipulation techiniques, and upon whom the creators are dependent for the majority of their revenue.
Next question?
And the next question really shouldn't be "Oh but aren't they really? Other products use advertising too!" If it is, please refer to the answer above, and add reading comprehension.
You don't know much about other industries then. Both gambling, food and drink sectors are optimized to build addiction and maintain it over the longest possible period. They call it "fidelity" but it's the same thing.
I personally think f2p is essentially a branch of the gambling industry and will eventually be recognised as such in law. After all, it was the case for coin-ops (at least here in Europe), which had basically the same business model.
Next question?
And the next question really shouldn't be "Oh but aren't they really? Other products use advertising too!" If it is, please refer to the answer above, and add reading comprehension.