Centepides actually only have 6 legs. You can see the six real legs if you look closely at a picture. The other "legs" work like legs, but are not actually legs.
I play, and I'm not desperate (and hopefully not an idiot either). Here is my reasoning, but I'm open to ideas from people who may think differently. First, obviously, playing is losing money, just like scratch-offs. However, a winning scratch-off is not life changing money, it's likely just making back some of the money you spent or will spend. A Powerball jackpot will allow you to actually have influence in the world. If you are someone who wins and decides to mooch off society just buying yachts and hookers and blow for the rest of your life, then it's just wasted. But the amount of change in the world by building something that betters humanity would actually be accomplishable.
If it's not raining/snowing etc. then it's actually safer and better.