Why doesn't anyone on the boneyard google anything. There are dozens of opinions pro and con on kettlebells. Studies on the possible long term damage to vertebrate have been made. I know that no hoopster ever made a layup by practicing on the kettle ball swing. And I know that three guys who, no doubt, spent time in the training program are out for the season with torn tendon and ligaments. Those are things that I
do know.
If you think your googling has found something authoritative, why don't you share a link?
Moving heavy weights dynamically is a well-established way to generate power. Yes, it can strain the back if done incorrectly and not complemented by complementary exercises, but done properly it's no more risky than other means of building similar power.
Some people really like kettlebells. And as a strength coach, you want to find tools that your players enjoy using.