Sir, if you go just think a little beyond the rhetoric that you hear from your moulana/zakir/etc you will realize that Prophet saw did not promise us solution to every problem, Allah has left few things for us to figure out. Now did he tell you which marja-e-taqleed from the 12 you should follow?
and this is a response of a man who talks about being rational!
well, thanks for putting at display the sort of "rationality" you had initially referred to, and also your understanding (or the lack of thereof) of the book of Allah (swt) and the mission of his Prophets (pbut). Saves my time. All the best.