Hehe...i know which post you mean. I commented on that one too, saying that luck is not a passive state.
It's something you need to be prepared for. Either by learning in advance or having the right ressources at that moment to be able to accept your "luck".
If you aren't prepared the luck will simply pass you.

Yeah i know what you mean with that self-help gurus, but isn't it that people actively decide to believe them and give them their money although there's enough info on the net for free. It comes always down to the same. Educate yourself and resolve dependencies to external persons/knowledge by doing so.
The more you know the lower the chances that others can scam you.

I would say you can attract luck. But not by thinking that you're lucky and that you deserve it. You need to be prepared and work for it. And then it's taking opportunities.