Aerodynamic forces are proportional to density.

Mars' surface gravity is 1/3 that of Earth's.

Mars' surface air density is 1/60 that of earths.

So to use lifting surfaces on Mars to fly, the situation is 20x harder.

It's roughly equivalent to flying at 40,000 ft on Earth with an electric helicopter. The world record for highest helicopter ever flown is 42,500 ft on Earth.

Flying on Mars is like flying more or less at the service ceiling of all but the most specialized aircraft can on Earth, and most of those are air breathing engines.

The structural weight required to make equivalent lift to weight ratios (L/W) is very much harder and the lower gravity doesn't make up for most of the difficulty.