I still don't understand that mindset. It's extremely limiting and kills phylogenetic variety dead. It would imply that the races are always going to be fit within those specific physical limits and that there are NO individuals who are outliers. (Granted, this fits in keeping with the lack of body sliders but that is NOT a plus in my mind.) It also means that the races are 'designed' and, frankly, that's just a boring tack to take in my mind.
The only benefit of using that route is making the question of childbirth easier to answer, and given all the rest of the downsides I do not believe for a second that it is worth it.
The only benefit of using that route is making the question of childbirth easier to answer, and given all the rest of the downsides I do not believe for a second that it is worth it.