Fair, but there are ready-to-go Linux configurations for RPi that assume you'll do "normal" things like talk to USB devices and the network.

Additionally, Linux has available a multitude of very rich in-band debugging and logging capabilities that help you understand and mitigate common problems— whereas a bad interrupt or peripheral configuration on some microcontroller could have you banging your head again a GDB frontend or shelling out thousands for a tool like Tracealyzer to tell you what on earth is going on with it.