Mayim Bialik joined The Big Bang Theory because acting jobs meant that she’d be able to guarantee her family health insurance.
She has a very steady job, and Big Bang Theory fans have Amy Farrah Fowler.
That distinguished degree didn’t provide the health insurance she and her family needed, so she was back into acting.
Luckily, her decision to return to showbiz, as she revealed on Popcorn With Peter Travers (via ABC News), has worked out well for pretty much everybody.