Quotealthough our emotional clockwork urges us to have kids, that urge is really only to benefit the specie as a whole and not on the individual
In today's over populated society, the same emotional clockwork if not countered by birth-control effort, the effect of over population may drive human to the edge of starvation, and possibly war, which at this nuclear era will be level of total extinction of all species on earth.
Our genes are not that perfect to worth propagated, but then if our genes are perfect (eg. immortal), we have lesser need to pass it on, as we don't need offspring to replace us.
Having giving birth to a child is a gift, such a child certainly worth cherishing, it's nice feeling to know you finally have a son / daughter. It is something else when all these does not come by naturally, but is done at a high price in term of the body, mind and financial burden, as the resultant child could no longer be considered a gift [from nature].
Simply having the ability to bear offsprings does not solve society's problem, otherwise many under-developed countries which undergoes starvation would be better off. We are in need of the advancement of science, to cure all diseases, to bestow immortality so as to enable fullest quality of life, without the over-population problem that could inevitably result in wars due to fewer resources available to be distributed fairly. Due to over-population problem, even if science have the cure for old age, one can be sure that the cure would be kept in secret to few selected top government officials, or those with the money or those few who have the first knowledge of the cure. Facts: If human overcome the age barrier, the ability to propagate must cease, to halt population explosion.
As MTFs who gone through great length to achieve the seemingly impossible task of transition, such is the mark of exellence of the human spirit [which overcome the natural birth gender], but to entertain the narrow scope of propagating their own species, they missed the further challenge against nature, such as old age, they unfortunately push their level to that of ordinary household women whose mindset is centered around family and kids.