The tempo thing is weird, but it does seem to work. Most sports do require some sort of timing/rhythm to maximize potential of whatever the motion. I’ve used Tour Tempo and it does work for me. You get to react to the tones though. I think part of what makes golf hard is that it is not reactionary which is why many have no issue hitting a baseball pitch, but can’t hit a stationary golf ball.
The Tour Tempo tones can be a crutch like a swing aide so you need to alternate using them and not using them…at least for me.