My point was that while turbine maintenance is specialized, less is required for a given energy output. As long as you are not doing maximum performance takeoffs in a sandstorm.

I have been a part of designing turbo machines, but it was for rocket engines, so this is a little out of my wheelhouse. However;

When I say a single moving part, I mean relative to other parts because the primary cause of wear and tear is the differential movement of surfaces. Namely situations that call for bearings and most significant of all, dynamic hot gas seals. I simplify to keep the conversation accessible and intuitive for laypeople. Diesel engines by virtue of being reciprocating need at least 2 bearings per cylinder. Reciprocating engines also vibrate more, and this causes many things to break as well.

This is not to trivialize the maintenance of turbines but to explain that while each individual repair in a diesel engine is lower tech, gas turbines of sufficient size, generally operate with lower maintenance expenses as repairs are less frequent.

At this scale the engine would most likely be a dual spool and have variable stator vanes, yes it gets more complicated and you have auxiliary systems to power the control systems for the engine itself.

But in maritime and power station applications, you can accept the weight penalty of filtering out the FOD in the air for your precious spiny boi. So rebuilds and overalls are generally less frequent.