Eq is a useful tool but generally not a solution .... Eq. generally dont adress the trade off it create to "improve" something , decreasing or impeding something else ...
And our ears/brain dont work as a linear Fourier tool anyway... And physical acoustic controls cannot be replaced by DSP and in some room/system well embedded there is no need for DSP E.Q.but sometimes as with the BACCH filters some DSP is irreplaceable by anything else ... Life is complex sorry ...