I got lucky end of 2013 till 2014 August I made 7K to 162K and than luck fly from window. I lost in 9 days 85% of capital but I get lucky again and I let that pain transform myself to became better trader. So the question is how long time you want to stay in trading? if it is short period than you can rely on luck made money and with correct timing, you can take the money and run never look back. But if you want to be trader until end of your life, if trading is your thing, than you can not rely on luck because it comes and goes.
Here is the good news, if you are hard working even when you do not rely on luck, in anyway it helps to you even in magical way. For example they as to Warren, is luck important and he answer that 'I got lucky to born in USA, 4% chance and If I get Harvard I would never meet with Graham'
Everybody needs a little luck but it is better not lean on it.