It's not about the morality or the standards -- it's about actions being treated differently depending on the tools being used to do them.
Killing someone for greed or jealousy is the same no matter which tool is used... killing someone to defend an innocent life is the same no matter which tool is used... and dead is dead, regardless of method.
And again, the story elements that Star Wars relies on see's a big difference. The tropes that Star Wars relies on (and this game relies on frankly) say that using your powers to dead is dead is more morally wrong. It falls back to Uncle Ben's "with great power comes greater responsibility." It's a feature of the story telling. A really old feature at that.
In stories like Star Wars dead isn't dead. Standards are different. People with powers are held to a different moral code than those who aren't. They are expected to know, do, and be better than their mundane counterpart. It's part of the price they pay for having powers that mark them as unique and special.
If that's not a story element you enjoy, cool. But then you really shouldn't be playing Star Wars, or Force and Destiny in particular since the entire story is built on the idea that while dead is dead, people who have powers have a higher obligation not to use those powers to make people dead.
It's not something everyone can agree with, but it is something that you're signing onto once you decide to play this game.
Different stories rely on different things. Can't really fault Star Wars, and Force and Destiny in particular, for doing what they felt would make a good story.
So if the same person uses a blaster to kill someone, or a lightsaber, or "Force-pushes" them off a cliff... for the same reason, and with the same result... that's different somehow?
Yes. I'm not sure how many different ways I can explain this to you.