Why would jumpers (specifically, DuPont connectors) be unreliable, or even unsafe? They're literally the method used in every single computer PC case in existence and work fine. I've never had one fail.

I agree, breadboard is slightly problematic, but that could be fixed quickly with a soldered perfboard setup or a quick custom PCB and remove the breadboard component.

The voltages we're talking about here is all 5V, and anything it's connected to should be pretty limited in current carrying capability.