Not only that, but most production house cues were (maybe still are?) made on back knife lathes. These pull the wood straight as the roughing cutter goes by, then the knife in back drops on the diagonal timed a little behind it. But the net result is if the wood was curved when it went in the lathe, it will come out with similar curve, adjusted by which ever way the wood wanted to squirm anyway to relieve stress as it was cut.
Using an A joint allows the use of shorter sections where any stress or even minor MC changes will have less effect (as built, not as abused later
) However, by the same token, i think modern makers of FS cues reveal the stress in the separate components, and throw them out. If you have ever sawn the prongs for a FS joint, some go nuts, twist, compress snake around. Some lay dead straight. Guess which ones make sense to continue in a time consuming build? I believe most also machine the cue the same way an A joint style is machined, over a long time, with a taper system and saw or router so as to create a straight blank.
The problem with FS is it takes a lot more, and better, feature wood. So the basics are quite a bit more expensive. Then the cues are usually worth less than a built up A joint type, unless made like a 360 or really well developed with veneers and such.
smt