This is a brilliant idea because India needs a bankrupt nuclear power who is hostile to India /s. That's an extremely short-sighted dumb take.
This is one of the stupidest argument tossed by liberal(Congress) politicians that "A stable Pakistan is good for India"..This caused 4 wars and weekly terrorist attacks. The new government took the opposite stance, guess what happen? Terrorist attacks are become lower, and they are so broke that a war is financially impossible to even think.
The nuclear bombs are already out in the market, pakistan already sold the technology to Iran, North Klorea and Libya. Even AQ Khan admitted that.
Secondly, PCB and BCCI have always gotten along well behind the scenes. While I understand why PCB has to publicly say they are concerned about BCCI owning T20 leagues, I doubt they really are that worried (or that BCCI will want to hurt its own bottom line by banning Pakistani players from foreign leagues). It serves no purpose - BCCI would love to have Pakistani players in IPL again if they can profit from their presence.
BCCI takes orders from Indian government...It doesn't matter how well they get along behind the scenes.