Well, tech has been the major wealth creator for past couple of decades and will be for next X yrs. If it has gender imbalance then society will have wealth imbalnce between genders.
Its not a problem if garbage collectors are mostly men and teachers are mostly women because they make same amount of money.
Goal of feminism is to give women same economic power as men. It is important because people express their preferences via money (not by voting) in a capitalism. So this fight is equal to voting rights for women, in a way.