Note: I have experience with a major manufacturer's turbocharged engine development team (in a past life).
1) Turbocharged engines are not less reliable, they are often more reliable. Despite the conventional wisdom that says otherwise.
2) Turbocharged engines have lower rod bearing loads than high revving engines. The inertia of high RPM, TDC loads rod bearings far higher than 15 or 20 pounds boost.
3) Combustion in a properly tuned turbocharged engine can take longer, therefore peak connecting rod loads may not be significantly higher than when NA. A longer push on the piston, so to speak.
4) Turbocharged engines happily create adequate torque at lower RPM's than a comparable normally aspirated engine, and therefore, many components experience lower wear. Cams/followers/valves/bearings/chains etc.
5) Turbocharged engines always have more robust internals and better piston rings. As they must be capable of operation with higher pressures and temperatures (better heat transfer is required). The common ultra thin, "low tension" rings that fail so early are not used on turbo engines.