I usually don't engage in political exchanges on this board because it brings the worst out of people and there is already a lot of that on this forum. However, this remark truly betrays ignorance.
The difference between PTI and others federal parties is that PTI is not a family affair. Tyrian White, Sulaiman Khan or Qasim Khan are not being propped up as leaders. When Imran Khan is gone, someone else, say Asad Umar, will take over and that's the end of Imran Khan.
Meanwhile, PPP and PML-N have largely become family affairs. In case of PPP, Daddy Bhutto died and Daughter Bhutto took over. Daughter Bhutto died and Baby Bhutto took over. Similarly, the mantle of leadership in PML-N is quite literally transferred through testicles like it is in a kingdom.
Given this, the problem of leadership that PPP and PML-N face in the future is far more stark than PTI since PTI is open to 200 million Pakistanis. Whereas PPP and PML-N have limited themselves to Hamza Sharif, Maryam Nawaz and Bilawal Bhutto.
Put it this way, you have a chance of becoming the next Prime Minister of Canada if you can prove you are leader material to the Canadian public. However, you'll never have the opportunity to become the next Prime Minister of Pakistan, not because you aren't leader material, but because you came out of the wrong testicles. With all due respect, this is not the way you run a country of 200 million.
I do wish Hamza Sharif, Maryam Nawaz and Bilawal Bhutto best of luck for the future.