My personal guess is, you may have a mission that is
easier to carry out because you are deaf, not
harder.
I do not mean "easier" or "harder" in terms of the amount of effort you must exert to accomplish it, but I would suggest your probability of success is higher
because of that work.
I apply the same reasoning to
any challenges people encounter in life, though--by working through them and learning in the process, one builds resilience, skills, and perspectives that aid in the success of one's particular mission in life.
I've known someone who was hoh that I thought this applied to...she rose to the challenges she dealt with (which included losing her mother at an early age to a drunk driver as well as some vision troubles) and was WAY more mature than other people I knew at her age. Even when I knew her, at 13 or so, I could tell she was going to really be headed places because of the strength of character she was developing...and she was
already making her mark in the way she dealt with people and the things she had to say.
There are other factors that lead to strength of character, too, but I think a disability can be one of them.