for newbie users it's a great way to get some coins for free and test a wallet with sending and receiving and such.
I don't really know how to use bitcoin at first, but faucet give me experience about how they works and intorducing me into bitcoin world
If no faucet exist that day, I wouldn't knew about bitcoin until now.
See, maybe faucets isn't so bad.. And maybe it's very useless for someone understanding about Bitcoin and holding them. But it's really helpful for newcomers.
It is nice to get your first satoshi without spending a lot of money. Spending time and losing it does not hurt as much as spending money and losing it. Investing is a risk, investigating and taking time to visit some faucets is not. It is a learning curve and a short incentive with a possitive feel you learned gained something.
If someone feels confident enough they might be pursueded to invest eventualy.