Even without his usual senses backing it up, the distress Rokuro is feeling over that thought is apparent. For a moment, all Kylo can do is give an incredulous look to the minor emotional breakdown he was not expecting to happen in front of him just now.

But he can relate, a little bit. He had killed his own master, and it's not a decision he's ever regretted, but he truly hadn't been prepared for just how strange it had been to live with a voice in his head throughout his life and to suddenly have silence in its place. At the time, he had imagined that his connection with Rey would take its place. Now, with some time to become more accustomed to that silence, he's not so anxious to fill it as he had been back then.

His voice carries a hint of the bitterness of personal experience when he replies, "Sometimes it's better that way."