Foam works great on cleaner to ball method. But I prefer traditional spray for clean to towel. It covers more surface area using less squirts.

I agree that any cleaner can be turned into a foam with the right dispenser. 

My whole criticism with the foam idea is seeing the foam sit where it's sprayed, and then watching Joe Bowler spread it all over the ball with his bare hands, thus doing what the spray already did, except subjecting his skin to who-knows-what toxins...

Once one company started the foam thing and the rest saw it's sales numbers, and now here we are...

You're correct.  No company would encourage the bowler to use their bare hands (imagine the potential liability if they did) but people do it anyway, and then reach for a slice of pizza or french fries.
 
The spray covers a larger area (per spray), whereas the foam pretty much sticks where it lands.  Either way can get all over your hands, I suppose, but I see it more with the foam because the bowler wants it to cover an area larger than when it's applied initially to the ball.

We probably should all take some precautions for our long term health, but to each his own...