Me and my Uncle were having this exact same discussion. I was pro-Arabic, he was Anti-Arabic. heres the pros and cons we got.
Pros:
Many nations speak Arabic.
It will help us understand the Quran better, as the original language is the best.
Arabic is spoken in Arabia and UAE, many Pakistanis go there for work.
And its Arabic, it has status unlike Urdu.
Cons:
Urdu is our Identity
We can urderstand Bollywood films (Although subtitles ae invented, may i add)
India has 1.1 billion people and is set to be a global power, which is important because people will start to learn Hindi and Urdu is similair to Hindi.
Me + Him also don't like the current Arab nations leaders or laws, so we shouldn't be assoiciated with them.