Jade does care about Shinjirou's well-being, in the same way one might worry that a tool would become too worn to be effective, but he doesn't think Shinjirou needs to hear that. Neither does he see the need to placate him.

"It's the way things are done." At least, judging from what he had observed when visiting other houses. "You'll stand next to my chair and wait until we have need of you. We'll be talking business after dinner, so you'll be standing for awhile." A brief pause. "But I'm sure we can make it up to you later."