That would also significantly narrow the scope of the question to something that's actually answerable. "but why gradle?" is basically impossible to decide bet

That would also significantly narrow the scope of the question to something that's actually answerable. "but why gradle?" is basically impossible to decide between "are there advantages to using gradle here", "gradle is abjectly terrible, why are you even using it", "gradle isn't available when compiling on an android device, why don't you use something with better platform support" or any number of more/less extreme/trollish questions/"questions".