So there are halachos that regulate this. There are hilchis gittin, does this mean every marriage must end in divorce? There are halachos about yefas toar, does this mea every soldier must come home from battle with one? There are halachos regulating the sale of an eved ivri and also a nirtza who wants to stay past 6 years, should we start a market to facilitate the kiyum of these halachose? The torah allows kiddushin through “biah” yet the gemara states Rav would place those who did so in cherem for doing so, why, if there are halachos that regulate this.
Halachos regulating something does not mean the torah wants or expects someone to do something. It means the torah allows it, under the rules it sets down. You are free to ask why. You might want to start with Rishonim such as Ramban and Ibn Ezra behind the “philosophy” of these mitzvos and your questions will be answered. Why chazal are not happy with a fathher who does this, will also become clear.