100 years is a long time for humanity to look into ways to counteract time travelling trolleys! Sure it _says_ the future trolley will kill 5 people, but if I were in that situation I'm fairly sure I wouldn't be so certain.
In your "political" example: Do you want a guaranteed bad outcome now, or what we expect to be the same bad outcome later?
> But could you make a better game if you didn't need to funnel people into buying gems at all? The answer is always yes - you always need to give up something to make people buy gems.
This ignores the fact there aren't unlimited resources to develop and maintain a game. Not requiring people to buy gems would improve some areas of the game for sure, but making less money is certain to impact other areas of the game - you always need to give up something in order to fit things in budget.