You can legitimately argue against some of the tasks we have used our military for, but this is childish at best. The level of peace and prosperity you enjoy on a day to day basis is almost exclusively thanks to our armed forces.Maiev Shadowsong said:No. We shouldn't be allowed to join the military. Because no one should be allowed to.
This world is filled with people that delight in preying on the weak. That has always been the case, and always will be the case so long as human nature remains unaltered. I suspect that the changes required would be drastic enough that the new generation could no longer be considered members of the same species.
Because of this, even people who are collectively devoted to peace must have some means to defend themselves, even if only by proxy. Without that, others who are less... principled can and inevitably will take everything, your homes, your family, your lives. In the end, clinging that strongly to your philosophy of uncompromising peace will only cause there to be fewer peaceful people in the world.
OT: I'll add my voice to the growing yes chorus. Only caveat is that there may be some situations where mixing genders may make the unit weaker. I suspect that those situations may be more rare than the officials in the armed forces fear, but it is indeed a legitimate concern. Of course, there is always the possibility of dealing with such cases by initiating an all female unit.