Why has ICICI Bank come to be known as 'CEO Factory' for financial services?

ICICI Bank has come to be known as a 'CEO factory' as its veterans, including Anup Bagchi, Anup Kumar Saha, V Vaidyanathan and Bhargav Dasgupta, lead HDFC Bank, Kotak Mahindra Bank, IDFC First Bank and Asian Development Bank, respectively. Other veterans, including Hitesh Kumar Sethia, Rajiv Sabharwal, Vishakha Mulye and Sudipta Roy, also hold CEO roles at leading financial firms.