If you have 3 Jade Dragons in a 30-card deck, you will get two of them in the starting hand over 15% of the times, in other words about once every 7th game.
It is very hard for most people to "feel" what is random and what is not. It might feel that you get a certain kind of starting hand way to often (or seldom). But if you actually take notes (don't trust your memory!) of how often it ACTUALLY happens, it turns out it doesn't happen as often as you think. And if you also calculate the odds, it turns out that real life mathces the calculations fairly often :-)