Controllers like that are used on nuclear attack submarines aswell so that is not the issue even though it might seem funny to someone not familiar with this stuff.
Those companies have made billions of them over several decades. It's much more reliable to go with a one like that than to develop a new one from scratch. Submarines don't implode because it was steered by a logitech controller
In a video I heard the CEO say they have spare ones on hand, just in case. But still, having my life depend on a Bluetooth device seems just wrong. Why not go with a direct cable? Much less to go wrong!
I don't disagree. I almost refuse to use even wireless headphones myself.
However all the fail-safes on the sub were quite decent in my opinion so the controller isn't really life-critical. The issue was that none of the safety features protects you from far exceeding the rated maximum dive depth. They probably didn't know what hit them.