Governor versus government

Why doesn't any govt dismantle the 'grey' powers of state Governors and the President?

The use — and misuse — of the office of the governor was cause célèbre, especially in Opposition politics in the decade of the 1980s. For reporters, it was a wonderful time, especially when the Governor of Andhra Pradesh, Ram Lal, dismissed the elected, majority government of NT Rama Rao and installed Nadendla Bhaskara Rao in office with the clear and unambiguous approval of Prime Minister Indira Gandhi. Worse, the drama occurred when NTR was in the US for a coronary bypass, and images of him returning from his travels and sleeping, exhausted, on a bench at the Begumpet airport