Things I've learned from this first attempt: If I were to loose my hearing, I believe that my playing and creativity would both improve. My evidence for this is based on the fact that once all external distractions were removed, I could truly focus on the music inside. Not just on the notes, but the phrasing, dynamics, rhythms and articulation as well without any influence from the outside world. I believe somehow, this technique needs to be further developed and I believe ALL musicians should have the means to practice in such a way. I will be experimenting with this further over the next few weeks.
Grand piano passion is devoted to Musations with hearing loss and adult students. One article, link below, has a perspective from the author that he believes his deafness has definitely influence not only his desire to play music but his perspective. There are other articles on this website that you might find interesting from this perspective https://www.grandpianopassion.com/2013/07/18/excerpt-making-music-with-a-hearing-loss/?omhide=true