Heya maddog

Yea, I agree there are plenty of ethical "hot-topics" like this around today. While the old boxing kangaroo tents are probably a thing now of a bygone era, activities like horse racing, for example, are still on the cards and one could argue a similar case on welfare grounds.
The absence of kangaroo fighting is probably only a small step towards improving animal welfare in a global context, but I think changes like this are important nonetheless as they help to shape people's views on animal welfare and their morals in regards to how animals should be treated. They help in setting a standard.