It’s the same for people who don’t understand basic electronics or mechanics. Any problem just becomes “it’s broken” and the only solution is to take it to an expert and pay for their time, or toss it and buy a new one. It’s expensive to be ignorant.
To take up a career in programming is to be professionally confused on a day-to-day basis. It’s normal to feel overwhelmed at times, but this is the advice I give younger engineers: accept that confusion, and try to channel it into curiosity instead of letting it fester into stress and anxiety.