I'd love to have a private pool in my backyard. I don't, even though it's nice to have, because it is too expensive.

We intuitively make cost-benefit choices in our private lives. When it comes to deciding the same things at work, our reasoning often goes haywire.

Sometimes we need an expensive thing to solve a real problem.

Your point about object-oriented programming makes sense. Sometimes, a bash script suffices, and the person who decides to implement that same functionality in Java is just wasting resources.

All of these solutions have a place where they make sense. When they are blindly applied because they're a fad they generate a lot of costs.