Deep career vs Broad(ly applicable) career

I've started deep diving into genetic engineering at university but I've realized just how narrow of a field it is. That if I had to move cities or had a gap between GMO jobs, I'd be just as unemployable as someone who had just turned 18. Even for tangentially related biochem professions like hygiene inspection I'm missing the requisite papers. I wanted to ask if this is something you think is worth being concerned about. Would it make sense to get qualified as eg. an electrician so that I have a way to cover the financial gaps wherever I end up, and don't have to resort to bar work?