A Tiger Moth is very old tech. A gifted and diligent amateur can keep one flying, there are estimated to be around 250 still flying. Compare to something like a Boeing 777. The major service intervals on a 777 are months apart, even a walk around inspection looking for obvious faults, damage leaks etc done after every landing can represent hours and thousands of miles. The 777 will easily do in a couple of days the hours and miles that some Moths do in a year, but that doesnt mean anything is easy or cheap.Absolutely not!
Although a simple aircraft, pulleys, cables and bellcranks need to be lubricated, the airframe itself needs to be periodically inspected, especially if one is performing aerobatics. Read about the maintenance of fabric aircraft and what goes into them, lastly we have some wood in the structure, very labor intensive depending on the environment where the aircraft is being operated. Are you getting the picture? I haven't even gotten into the engine! Engine oil - 25 to 50 hour changes. Inspections - 50 to 100 hour. I believe a few of our members have actually turned wrenches on the Moth so I know they'll chime in.
No - even the simplest of aircraft cannot go for "hundreds of hours" without some kind of maintenance!