Yah absolutely. Urudu is a national language of Pakistan, and as such the people are right to learn it, but Punjabi is the popular language of the majority of Pakistanis and they should never give it up.

I worked with a British Indian recently and we had this conversation. He insisted that our Punjabi was becoming less pure with the Urduization of it, in some cases a Persianisation of it, I think thats part of language evolution...although there should never be an effort to disregard it.

You`ll find most Pakistani Punjabis fiercely proud of there language, mate.