Why cant two actresses coexist without outdoing each othet?

A lot of sexist people here are pitting successful women against each other for their amusement. But it is just plain sexism imo. Both Ash and Rani are irreplaceable today and have immortalized so many roles, that most of us have grown up on. In fact they are till last year been working and even delivering big successes. Can’t actresses have their own space and be successful at it? Why do you have to be someone else?

I feel it's not related to sexism.The same happens with actors.