Because evolution happens in discrete steps, speciation happens at particular moments in history. If you wanted the “correct” method for categorization you would pick the cause(s) of the speciation events. But this often times not possible because we only know traces of the history of evolution.
Crossbreeding is a poor choice for categorization because it only captures one chapter of the story. Its a solution used by genes to carve out their niche against other genes, but its not the only solution.
Because evolution happens in discrete steps, speciation happens at particular moments in history. If you wanted the “correct” method for categorization you would pick the cause(s) of the speciation events. But this often times not possible because we only know traces of the history of evolution.
Crossbreeding is a poor choice for categorization because it only captures one chapter of the story. Its a solution used by genes to carve out their niche against other genes, but its not the only solution.