This is serious, even though they place a bet on them. However, things are really happening in some countries you can imagine the confident that people have on this rams. Honestly, this is quite annoying to me because I have never seen such thing in my country, although just like as you mentioned that is how it goes because we all have different ways we do things, so is quite a normal thing that we can never change.
You're lucky if you're in a country that don't have these kinds of events and betting.
Because some countries value this as part of their tradition even if it's so gross to the eyes of others that are not into it.
We respect their tradition but putting it in the line of the bookies could make the feelings worse for those that find it gross.