Thanks for the link and a good read. While this is possible, this is not something I would say most pigeon racers would do in practice. In this way, perhaps a small portion are giving a bad name to the rest?
While I personally share your opinion, I wouldn't make our opinion a universal. 'theres no need..." is a bit stronger than I would say it because this wording sounds objective. Other people apparently do see the need.
For several decades, I have seen no need to eat birds or other land animals. While others have continued see the need. It's a difference of perspective.
Someone might say they _need_ to race the birds, and they might feel that in their bones to be true, but does that actually make it true?
I'd say no. There are lots of great hobbies that don't involve putting the animals in those stressful and potentially fatal situations, so someone making the claim that they need to do it just sounds like mental gymnastics to me, personally.
By declaring that something that someone enjoys doing for whatever reason is not necessary, in situations like this, one appears to be implicitly attempting to erode their right to do it.
Anyone can think of many things they do for fun which are not necessitated.
Perhaps it would be better to be more explicit, if that's how you feel: "Everyone should refrain from ...'