I appreciate the general premise of your question, I've actually thought about it before...I'm sure the thought has run through most, if not all Beeks minds at one time or another to at least some degree.
However, I think this is one of those that you have to take the "don't over think it approach".
If you have the opportunity to catch a swarm, want it, and it can be done safely....catch it. If you don't want it, aren't interested in the bees, or it can't be done safely, pass on it. Trust me, either way, life, the world and the bees will go on.
Looking at every swarm opportunity philosophically and weighing whether the world will be made a better place by my decision to catch or not to catch is just a little too much for me. :-D
As a general rule, I think people regularly overestimate our ability to affect things relative to mother nature, either positively or negatively. Honestly, I think we're a lot more insignificant in a lot of ways than we would like to believe.