What must be realized is that the Alamat Al-Qiyama are signs, not causes. The Qiyama will not happen because someone is building tall buildings, it will happen because Allah wills it. The time of Qiyama has already been set, and the signs just mean that this time is coming closer and closer (as it naturally should given the nature of time).
Taking this sign in particular, here's an excerpt from a longer hadith that mentions it:
He said, "Inform me about the Hour." He (the Messenger of Allah) said,
"About that the one questioned knows no more than the questioner." So
he said, "Well, inform me about the signs thereof (i.e. of its
coming)." Said he, "They are that the slave-girl will give birth to
her mistress, that you will see the barefooted ones, the naked, the
destitute, the herdsmen of the sheep (competing with each other) in
raising lofty buildings."
Many people have interpreted "the barefooted ones, the naked, the destitute, the herdsmen of the sheep" to be the Bedouin tribes of Arabia, but I'm not going to get into how accurate that interpretation is. What is apparent is the sense of unlikeliness of this event happening during the time of the Prophet. In other words, enough time has advanced from the event of narration that the unlikely has become the norm. Thus Qiyama is getting closer and closer.
Remember the golden mantra of statistics: "correlation is not causation".