A Seek and you will find. Tell that to the homeless man digging through a dumpster. A Knock and the door will be opened for you. Is not very comforting to a starving refugee who has been turned away from country after country. Of course not.
Miracles still happen.
God likes to know we trust him and he will hear our prayers and will answer them. The first thing is to stop quoting it out of context, or at least to remember what that context is. The verse is not about prayer in general. It is about something very specific C the gift of the Holy Spirit. This passage does not teach us about answered prayer.