Kylo Ren as a character has always said things in a very direct and matter-of-fact way throughout the entire trilogy.
“The map to Skywalker. We know you found it. And now you’re going to give it to the First Order.”
“I feel it again. The pull to the light. The Supreme Leader senses it.”
“I know what I have to do but I don’t know if I have the strength to do it”
“Let the past die. Kill it if you have to. That’s the only way to become what you were meant to be.”
“You’re a ghost. In a rotting clone. What could you give me?”
I dunno, it just fits.