Im not sure if it is okay for a non-teacher to post on here.
I am a student , I have been playing piano for 14 years, I was brought up doing so.
After turning 13 I stopped winning competitions and stopped getting accepted into places because I was just lazy and I hated practicing and was always afraid before my lessons because my teachers were all mean and told me " If you just practiced you would be better than mebut for now you are not a pianist but a nothing." I just shrugged this off and assumed they said this to everyone. So for now to be 2 years I have studied with another teacher. You described your student just the way I am ( by the way im 16) It will take time for your student to realize his/her potential it took me 1 and a half years. I was always uninterested in my lessons, Whenever I didn't bring my music I thought he would get angry and I asked him are you angry? and he said " No, why should I be angry?, if you don't like the piano you don't like it. My job is to help you learn how to play and encourage you but not to make myself angry for something you did" whenever I didn't feel like playing he would always tell me the history of the piece, lol I now know the music history of every single piece I have played

He would tell me the meaning of music, is not to win anything it is to experience it in that moment He told me that many want to go to julliard but he said that place isn't about the music anymore, it is about being a robot to them. It didn't change my mind that juilliard might have many musicians that do care about music, but it made me have a different outlook on the meaning of music. He told me to try to pick up a pencil, without thinking about ANYTHING and I couldn't lol, he said, you can,Just like when playing a piece you shoudlnt be thinking abotu anything..just experiencing the piece and connecting that to your emotions but music is not about being smart or thinking or being perfect it is about "feeling" not concentration but feeling the music through your veins letting everything stop and flow like an ocean That helped me especially during performances, I didn't feel pressured to play without mistakes, it just happened naturally. I thought this was corny but it has helped, note, this didn't help me the same day he said it but it did inspire me to practice. In my last lesson, he told about Chopin's life, and told me to think about the saddest thought I could think of , then play the piece ( Chopins Nocturne in c# minor) and When I finished playing I was crying it was so surreal, and just amazing. Since that lesson, I love practicing. There are also many other things he did but to many to name here. Just remember this takes time, It took me 1 and 1/2 years to realize my love for music.
https://www.artofpracticing.com/^ book he suggested to me.
Hope this helped.