Everybody says this, but the problem is that RNGs are friendlier to noobs.
The real problem is that any game like this has two markets--noobs and experts. And you have to win over both--that's a tall order.
You have to have a continuous influx of noobs or your game dies. However, the experts have to be able to fleece the noobs and gain enough money consistently or they will leave and you will have nobody encouraging the noobs.