What Does It Mean To Be A Reiki-Master?

In my 16+ year experience with practicing & studying as a Reiki “Master-Teacher” I feel that while I do my best to honor the original traditions of the practice of Reiki as I was taught them & as  Dr. Mikaomi Usui taught them (the original Reiki teacher), I find that using the term “Master” seems to over simplify and even disrespect what the practice of Reiki is- the passing of Universal energy with the intent to help another on their healing journey. Can anyone truly “Master” Universal Energy? Can anyone “Master” another’s healing path? No.