Does it? How? I'm not trying to be curt, but I've yet to see a scientific explanation that supports your assertion. Logically, it would seem that agitating the beer mid-process would hurt clarity, not help it, as particles that have been slowly falling out of solution are mixed back into even distribution throughout the beer. Intuitively, I would think that using proper racking technique (with the tip of the siphon just below the surface of the beer during the entire transfer, ceasing as you approach the yeast/trub cake at the bottom) would result in clearer beer if it's left undisturbed for the entire time until it's time to bottle/keg.
I ferment in my basement. There is no suitable place there for me to lift the fermenter up to rack to the bottling bucket, so bringing the fermenter upstairs to my kitchen inevitably agitates it enough to lift some trub and hop debris off the bottom which, as I said, can get then get into the bottling bucket and clog my wand. Racking to secondary as an intermediary step eliminates the vast majority of the trub and hop debris getting into the bottling bucket.
How would a little extra yeast or hop material result in "volatile" openings? Yeast don't ferment hops, so what's happening here?
See posts #5 and #9 from this thread where a few others have reported the same experience - one suggesting that the hop debris can provide a nucleation site for C02. I don't know if that's a correct explanation, but
experience shows that the phenomena isn't unheard of and many have attributed its causation the same as myself.
https://www.homebrewtalk.com/f13/dry-hopping-hops-bottle-108832/
Of course everyone can do whatever they want, and you can certainly still make great beer using sub-optimal techniques, but I've yet to see a scientific explanation that has convinced me that racking the beer to another vessel improves clarity at all. Indeed, if anything, it would make it worse.
As I suggested above, some of us have a set-up that inevitably increases the likelihood of agitating hob debris and trub off the bottom during or immediately prior to racking. If your set-up allows you to easily and conveniently avoid any agitation and to rack perfectly then that's great, but others are less fortunate.
Last, a note on the scientific method: Science is based on hypothesis, observing an experience/experiment, and then either rejecting the hypothesis or keeping it until later disproved (science can never prove something to be true). There is no 'why' in science, but merely repetitious experience of the 'what' or 'how'. That's how human beings attribute 'causation', - by repeating the same phenomenon enough times until a result can be correctly predicted. To say 'why' something happens denotes a motivation - a conscious force directing the process. Nonetheless, many English speakers, including some dictionaries, have co-opted the term to mean all and any explanation for processes. Nonetheless, science is merely the observation of phenomena that
appear to have a causal relationship - and since the senses are always fallible, there's never a guarantee that the resulting conclusion is correct. Therefore the process of me observing hops getting into my bottles, and attributing the resulting gushers to be caused by those hops is nothing less than science. I tell you this because many people, and you may or may not be one of them, put 'science' on a pedestal and ironically attribute 'magical' qualities to it. In turn, the people that wear white coats become the new high-priests of modern living.