From the perspective of a farmer, raising family meat, that makes sense. You don't need the distinctions if your raising just a few head.

These days, we trade grazing land for beef, but all the cattle out there are heifers, cows or steers. When the farmer brings a bull in, it is plain to see why only one bull is allowed at a time.

However, both males and females are beef, and there is no difference in the market price, so cattlemen raise both of them. From the perspective of a rancher, letting a bunch of bulls run with the herd leads to all kinds of trouble. Bulls (and stallions) are aggressive, and unpredictable, even dangerous. Hence castration which makes steers out of bulls (and geldings out of stallions) and makes for peaceful grazing. However, that depends on the kind of grazing land available. If the land is good, ranchers can keep more steers, but if the land is bad, the cows are more valuable, because they can reproduce - so the steers are culled and sent to feed lots.

SC, I went way off topic here, but I appreciate your reply.