If she used scissors, it's not razor cutting. What you're describing is called point cutting, and it's done to soften the edges of layers or bangs.
My stylist cuts my blunt bangs this way; since I have thick hair it helps to blend the edge a little so they don't stick out like a shelf. They still look blunt, it's a pretty subtle difference, but I like it. It's not damaging to your hair, but if you don't like the look just mention it at your next bang trim so they don't do it again.
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