How? I've heard this argument a lot. How does me knowing how to solve a problem I created myself make me better than me avoiding it altogether? To expand on th

How? I've heard this argument a lot. How does me knowing how to solve a problem I created myself make me better than me avoiding it altogether? To expand on this: how many engineers you work with know what actually happens in a CPU when they run a for loop, for example? How many of them need to know that? It seems to me that a lot of people are very successful at creating useful things without understanding the underlying tech. Isn't this why we built it?