Here's a problem or maybe better to say, challenge.
When you decide to commit to Standard bred fowl and decide to breed them to that Standard, you are almost forced to put a LOT of chicks on the ground, as
cmom said rightly. Even with some of the best birds in the world as one's start, roughly 75% of the chicks will not be good enough examples of the breed to satisfy your critical eye.
An old timer's saying in this fancy says, "Folks usually fail to become good breeders because they don't eat enough chicken". A folksy way of saying you're gonna cull, cull and cull some more, each and every year. You can eat them, sell them, send them to an auction and/or keep a few of the females as table egg layers,
(although you'd be better off getting production reds for that job).
A breed is a "man-made" thing, of course. A breed isn't a species. The Red didn't walk out of a jungle. We made them by selective breeding and they only "stay put together" by continued selective breeding.To keep your "handi-work", your birds, the birds of your breeding moving foward and staying good examples of the breed, we fight the law of the universe called entropy. This law, like the law of gravity, is real. It states, simplistically, that things do NOT stay organized. Things move from a state of order to disorder. This means that without strict selective breeding, one's birds degrade and entropy. They need selective breeding each and every year. To accomplish this, it is best to have a few decent to pretty good birds every year.
Since one can only expect 5-10% of the birds one hatches to be good enough to make the grade, it simply takes a lot of hatched chicks to find those 4 or 5 birds you'll winter over for the next year.
The second reason we don't get excited about whether chicks are males or females is that we've gonna have those birds for a loooooong time.
Cmom nailed this too. You cannot really pick your "winners" and/or your "keepers" until they have been fed and cared for over a 8-10 month period. It takes these birds a long time to grow. The male you think looks GREAT at 5 months or 6 months can absolutely go to junk as he comes into his own at 11 months of age. Birds you might get in a hurry and cull at 3 months may turn out to be a stunning adult and in our rush, we just send him down the road. Dang!!!
So, in short, there's sooooo much time. There's no way to really rush anything. You're gonna burn a lot of feed money before quality decisions can be made about them.