well, for me it was. i'm not asking this question because i'm actually trying to do it anymore, but i used to do it out of insecurity. my voice is actually quite feminine without any modulation. my voice never deepened, but when i was 11, i started the technique for a female voice modulation even though i didn't need to. i found it very difficult. it was very hard for me to stay in the lower relaxed part of that voice. it would go up and down, and sometimes it just wouldn't come out at all since i'm so obsessively nervous, and there would be tension there, not allowing it to come out. my question is, is that kind of voice modulation only practical for someone who has a deep male voice with many harmonics, or is it really that hard? my voice really is female, but i can't modulate it, and i'm just obsessive that way. i have to know why i had so much trouble with it.