I'm a drafter/designer who has worked with engineers for years and also designed my own fair share of parts...I'd say it's the liability issue. Overengineer something and you won't have to worry about it failing. Which in a lot of ways is good (safety and reliability), but it can also make maintenance a nightmare (as you've found) and drive up costs.
A former company I worked at designed (amongst other things) I-beam constructed baseplates ('skids'). A long time ago, an engineer had written a design guide (rulebook) for these skids such that the skids always were overengineered, and were much stronger than they needed to be. The main reason was so that dumb drafters like me could, by using the design guide, design a skid without an engineer having to approve it. It was mostly for lifting of the skids, so that there was a 4x safety factor. Hiring 10 drafters was a lot cheaper than hiring 10 engineers to design the same thing, even if you used more material.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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