The end game is to create a fully fungible digital cash equivalent which can be used for legal or illegal activities. You might say that no one has any need of such a thing, but continuous government monitoring only happens because encryption isn't built into everything by default and the monitoring is therefore possible. With technology like Monero governments will have to return to honest law enforcement. Furthermore, sometimes you might have good cause to do something illegal. What if a pain medication that you need has been banned by the government but the only way you can get it is to buy it on a dnm? Just look at all the new efforts by governments to ban opiates. Chronic pain sufferers must be in a state of horror witnessing this. What if you support an illegal cause (Monero development might be illegal in the future)? You could donate with Monero, otherwise you might find it impossible to contribute.