Hey guys, quit feedin' the troll. We have ignore-lists for the express purpose of keeping your blood-pressure down and my life is far the happier for making judicious use thereof.
As to the question at hand: movements* are the primary reason that I got into LF.
More detail could be a nice theoretical bonus but 4x5 isn't a huge improvement over 6x7 in that department and it's swamped by differences in film technology. For example, 6x7 Acros is about 35c/frame, 4x5 Fomapan (Arista) is 70c/frame and 4x5 TMX/Acros is $1.80/frame. Going to LF approximately doubles the film cost for no increase in resolution, or you can increase $$ by 6x for about one extra stop of detail. Similar price ratio (4x) for shooting E6 and about 7x if you want to shoot C41, still for just that one extra stop of detail.
I'm also a recovering technophile so I enjoy the challenge of using (and getting the most out of) complex toys and while that's a bad reason to choose a particular artistic approach/technology, I'm pretty sure it applies to a lot of LF users. It probably doesn't matter though as long as the technology isn't actively holding you back - I make a point of using more-appropriate toys when taking more-spontaneous photos like candid portraits in poor light, or travelling around the world.
* movements are not happy accidents. Movements are the result of a plan to achieve a specific (pre-visualised, even) outcome in terms of perspective and focal plane.