It's not the morality of it that concerns me."Training mode" is very un-Mandalorian. It makes sense to our soft culture, and even to an order of warrior monks like the Jedi.
It's the idea that what is essentially a giant plasma torch has a "safe to touch" setting.
I can understand your position. From where I sit, "plasma torch" is a conjecture based on real-world science. A light saber focuses energy through an entirely fictional crystal to produce an entirely fictional blade of light. The creators say light sabers have built in safety scissors. That's a far cry from the most far fetched thing Star Wars fans are asked to accept.