Why is Wagyu so valuable?

Could you elaborate on why Wagyu beef is held in such high esteem and considered so valuable? What specific factors contribute to its esteemed reputation, and how does it differ from other types of beef in terms of taste, texture, and overall quality? I'm particularly curious about the unique farming and breeding practices employed to produce Wagyu beef, as well as the cultural significance it holds in certain regions. Additionally, how does the limited availability of Wagyu beef factor into its high price point, and are there any ethical concerns surrounding the production of this luxurious meat?