I only very rarely go bowling, and haven't much interest in watching it as a spectator, and to the extent I gave bowling any thought at all (very rarely), considered it a completely non-technological sport other than the automatic pin-setters. NEVERTHELESS, I am a big fan of the fascinating science/engineering oriented channel Versitasium, and so when I came across this Versitasium YouTube video on "How Hidden Technology Transformed Bowling", it provoked my curiosity how such a seemingly crudely straightforward sport could be transformed by technological advancements (e.g. think how radically advances in golf equipment technology have changed that sport). How could the explanation be worth a 28 minute video? Trust me, it is.
For starters, the interior construction of bowling balls is not at all symmetric (way beyond just the obvious finger-holes on one side) - they contain an asymmetrical weight block embedded two to three times as dense as the surrounding interior material comprised of lightweight glass beads. The shape of this asymmetrical core weight is chosen to alter the ball's axial inertia to facilitate a particular degree of hook-spin, which curved path significantly enhances the probability of bowling strikes. Also, it turns out that the particular way bowling lanes are waxed, and how this wax pattern changes over time with use, greatly affects which type of asymmetrical core works most optimally toward producing higher probability of strikes - thereby higher-skill bowlers (especially at the pro level) will carry a suite of different balls with them to competitions, changing balls the way pro golfers carry a suite of different wedges for different types of approach shots. The wax pattern on the lanes is also a matter of sophisticated high-technology - without a differential waxing pattern tapering off to bare wood about 2/3 of the way to the head-pin, it will be much more difficult to bowl strikes because it becomes much more difficult to curl the ball into the pins at an optimal angle. Also, balls vary according to the degree of polish on their surface, so for more advanced bowlers, choosing (or dynamically changing) to a more optimal ball suited to how it will react on current waxing pattern or condition of the lane) is critical - the video contains some very convincing demonstrations of the differences in how different balls react to different conditions.
Worth a watch, even if just for the initial segment of the surprising construction of bowling balls. Note that "house balls" are often just symmetric, solid polyurethane spheres, and this video explains why your chances of scoring well are handicapped by not using a ball with more sophisticated interior design, beyond just the limits of your raw skill.