I do not believe in "luck" since I recognize predestination. Every life-force is required to experience what is called luck and what is called unlucky since living is the process of learning the 360 Degrees within and without of every subject matter.
In searching for a way to defend bless because the people who usually use it are associated with the Christian religion, I define the term "bless" by its spelling being "be less." Almost every place one finds it in scripture the implications the person blessed will become less than civilized man.
An example is Psalm 1:1 which reads; "Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful." Most People calling themselves Christians are usually "counseling ungodly, preventing sinners form seeking truth and scorning" people yet they call themselves civilized. I would have to "be less" than what they term civilized or righteous to not do the things we are told would make one "blessed" to be blessed. The same is realized when we read "the 'B' attitudes" in Matthew 5:3-11.
Because of that realization I say neither, lucky or blessed.