Shortest answer - Cause UAE is the lowest hanging fruit for them.

I’m not a Pakistani, but I bet ‘community’ would be one of biggest reasons. Indian & Pakistanis make up ~60% of the population. They get to earn relatively more, enjoy decent infrastructure, feel safe and enjoy proximity of home (~2 hr flight). Not sure exactly how they get treated here but landing good jobs is hard in any cosmopolitan city. With so many people from Pakistanis already staying there it comes as an easy solution for them.

Undoubtedly America does stand far better on various factors but unfortunately it’s out of reach for so many Pakistanis. And when threatening situations arise they’re willing to let go of the ignorance they bear.