My
personal take is: many girls don't understand, so sometimes its hard to justify something they see as a "hobby" when it may be a passionate love for music and playing. My wife does not know why I would want another amp, I could not possibly understand why she wants a bigger house with wooden floors.
Music transcends mere materialism. Many cannot appreciate that. Of course we lose the plot when the desire for equipment is to have more "stuff" rather than furthering music and creativity. At that point it is probably better to be more moderate, I try