PTV offers the view of the incumbent gov't. Would you like it to show a PTV interview of him (which has pre planned questions likely) or ARY interview (whose job is to accuse gov't) or Geo (more pro gov't, but isn't as pro as PTV).
But then Inqalabis have problem with anything that goes around PML and their "supreme eternal leader of Pakistan, Imran Khan" is too much of a coward to go and do an interview on geo. Not to mention holding his other party members back as well because he's so scared they might expose him accidentally. But he will offer an interview to ARY-like channels (lucman-like person) any day.
I don't agree with PTV showing geo interview, but I also don't agree with Imran not giving interview to Geo when it accuses it all the time and because of him many Geo workers have been injured or abused.