Quitting would just be the first step in "I do not want to participate in this". Whistle blowing is much more complicated in that you are hoping to not just not be participating but maybe stopping it altogether. Being young and single compared to being older with dependents would absolutely make that decision harder. Violating secrecy laws to disclose illegal activity seems like something that should have a caveat to allow, but of course they don't.

This is a moral psychological quandary: quit and hope everyone shares your moral compass. (hint: they don’t).

Or work to pressure change internally, and occupy space that might have gone to a more morally flexible person if it was made vacant; but while doing so engage in supporting immoral behaviour.