Hi slayer,
I agree. If you read what I posted elsewhere, one of my key argument is that many practitioners have been using high profile persons to read their Bazi and then arguing on hindsight why certain favorable luck pillar bring them good luck.
If you were to use Bazi to read the chart of average Joes without the benefit of hindsight, most people will find it extremely challenging. I have nothing against Bazi though, I just think we need to consider its appropriateness in different circumstances.
Still reading ZW is tricky with so many stars(colors) trying to find the outcome(final resulting colour).
Take my current traval palace. Would you dare to make a prediction looking at it? So many good and bad stars influencing it I dont know if I would advise ME to move or travel.