I've been coding for over 20 years now! (WOAH, do I feel old)
I've touched just about every resource imaginable under the Sun (too bad they were bought out by Oracle)
I am a professional DevOps Engineer with a demonstrated history of working in the internet industry. I am an avid Linux lover and supporter of the open-source movement philosophy.
If the idea is to use only things available by default, note that BASH doesn't come with every OS out there either.
POSIX sh is far more common than bash
I think that if you change the shebang to
/bin/shit would also work fine.