What happened in the IPL was partly due to the fault of BCCI was well. After Varun Chakravarthy exited the bio-bubble, they allowed him to re-enter without any quarantine requirement. And he infected at least a dozen others inside the bubble. What happened was that the IPL management had asked KKR to put Varun in quarantine for one week. But KKR refused and since the KKR owner was very influential, the BCCI granted an exemption to Varun (the same happened with PSL as well, with the Peshawar Zalmi).
The BCCI should have forced everyone to abide by the rules. If they can't force everyone to obey the rules then there is no need to do bio bubble in every series. They don’t punish players. Players are also reluctant to bio bubble. So now the BCCI should punish the players who break the rules so that no one breaks the rules in the future.