Belive in destiny? - then why bother

As would be clear by now, I am the bad boy- a well established atheist. But I pity the good boys of the game – the worshippers.
Almost all of them are also believers in destiny. They feel that every event of their life has been scripted by the moving finger, which, having writ, moves on. It is all tied up in advance – how they will fare in studies and career, who they will marry and how and when they will kick the bucket.
Those who do believe that all this is sewn up before they even take their first breath should actually be most blasphemous, most irreverent and most spontaneous. If all will be what it has to be, why bother? Surprisingly, however, you find them queuing up in long lines in front of astrologers, face readers and roadside parrots to find out about their tomorrow. Then they try various stratagems to change the expected outcome to something the want it to be.

By doing this you clearly doubt the credentials of your God.
You are like a customer who asks a mechanic the cost of repairs for his car and finding it too high, moves off. Coming back after a few days, you asks again. If the mechanic quotes higher this time, you remind him of his previous low quote. If he has forgotten the previous quote and makes a lower quote this time, you would be last person to remind him of his previous assessment.

Oh come on, either believe that your God is a wise person or do not.

I do, however, find some sense in the following skeptical approach.

A famous scientist was found nailing a horse shoe to his door for good luck. When asked, ‘Do you believe in God and luck?’. He replied, ‘ No, but since nailing a horse shoe costs so little, isn’t it worth it? Just in case.’