Don't kid yourself, the 180 FLs DO require a faster twist rate than 10 in order to achieve their full intrinsic BC. Minimum "suggested" twist rates by the manufacturer are not always sufficient to net you all the intrinsic BC of a specific bullet, even though the bullet might make it to the target just fine. A twist rate that will give you an Sg of anywhere from above 1.1 to about 1.4 will "stabilize" the bullet sufficiently to reach the target without key-holing in most cases. However, you will be giving up a certain amount of the intrinsic BC of the bullet due to excessive yaw/pitch as it exits the bore. Just because a bullet is stable all the way to the target doesn't mean you're getting everything possible out of it in terms of BC and resistance to wind deflection.
The longer a bullet is, the faster it will generally need to be spun in order to achieve gyroscopic stability. That means increasing bullet length at a given weight will require a faster twist rate to achieve the same stability as for a shorter bullet of the exact same weight. However, manufacturers may not want to list a minimum twist rate for a given bullet that is so fast that almost no one is likely to already have such a barrel spun up for their bullet. If shooting a new bullet required every end user to buy a new fast-twist barrel and have it chambered, sales could easily be negatively impacted. It's analogous to advertising high velocity band G1 BC values, which makes the BC seem higher in comparison to competitor's products. This type of advertising approach has been in use since advertising began. There is nothing particularly nefarious about this; companies are in business to make a profit, which requires selling their product. In order to do that, they will advertise in a way they feel puts the best "spin" (pun intended) on their product to increase sales. So, a manufacturer might advertise the high velocity band G1 BC, or a list slightly slower and more commonly-used twist rate sufficient to stabilize a given bullet, even though it might not be fast enough to net the full intrinsic BC of the bullet. If the end user is only shooting them out to a few hundred yards, they might never notice the difference. But at 600 to 1000 yd, the difference is noticeable, particularly when shooting them in competition over a long period of time. Ultimately, it is up to the end user to be aware of these facts and determine for themselves the difference (if any) required in their setup for "satisfactory" versus "optimal" performance.
FWIW - a 10-twist is not enough to produce an Sg of 1.5 (or greater) with the 180 FL bullet, not even close. They'll make it to the target just fine from a 10-twist; i.e. it is not so slow a twist as to render them gyroscopically unstable. However, you may be giving up a significant amount of the intrinsic BC, and therefore wind resistance. What is the point of spending the kind of money those bullets cost, and then throwing away performance? In F-Class competition, even a single point or "X" can decide the match. No one in their right mind gives away performance (or points) needlessly. In contrast, in other types of shooting, the amount of BC given up by using a slightly slow twist barrel may not be noticed as much as long as the accuracy/precision remained satisfactory.
The FL bullets are exceedingly long for at least a couple reasons. First they are made of a material not nearly as dense on average as a lead core bullet. Therefore, they need to be longer than a lead core bullet of the same weight, unless they had been designed with a ridiculously long bearing surface, which might defeat the purpose of improving BC, as well as introduce other unwanted issues. The 2nd reason they're so long is because lengthening (and pointing) the nose is probably the simplest way to increase BC. I don't think anyone would argue that the FL bullets are extremely long and pointy relative comparably-weighted lead core bullets. They are so pointy, in fact, you really have to be careful when working with them; it is very easy to get your fingertips jabbed because the points are so sharp. In any event, the twist rate necessary to achieve an Sg of 1.5 or better from a 180 FL bullet is fully in accordance with their shape and sectional density; there is nothing "unusual" about their required twist rates relative to lead core bullet of comparable weight.