Boxers should not be allowed to avoid each other

Nowaways, champions fight people past their prime or that can't beat them at their prime. They do not risk to fight someone that can beat them at any given day. Boxing is getting less and less popular, yes PPV plays a role in that, but also the fights aren't as exciting. I mean you can look on paper and judge if a fight is worth watching or not. If boxers aren't allowed to avoid each other, the best will always fight the best and anything can happen, which brings the excitment on a whole nother level. The best example of this is Floyd Mayweather. He is looking for the easiest route to win a fight and make money. He is not risking. NO, floyd isn't the only one out there, but since he is so well known (today he's probably one of the only active boxers that the averaje joe knows) he's my example, because he represents what I'm trying to say. Why do you guys think about this?