When you have to work your kids around your job rather than your job around your kids, then you are stepping into that territory of NOT being a good mother. When you bring your job home and have no patience or time for your kids even when you are at home, then you are not a good mother. When you have no time for your kids or are too tired to listen to them or play with them because you are too tired from your job then you are NOT a good mother. Because Motherhood still has to come before your career. If the career is that important to you, then you have to make that decision before you make the decision to become a mother. Not everyone can have everything and it is no mitzvah to bring children into this world that will be ignored or raised by others. Those children grow up feeling unloved and unwanted and they carry the burden of they mother’s choices.