From an engineering perspective: it's good to test an experimental device to the failure point.
From a mission perspective: perhaps there are cases where they can fly it out to check out a rock or ridge-line otherwise inaccessible. It's can only take pictures, but still…
Most importantly, from a PR perspective: Ingenuity both holds public fascination itself, AND it could take dramatic landscape shots of the Perseverance rover working away on the surface. Has NASA never heard of Instagram?
Just flying it as far up as was prudent, would provide a whole
new perspective on the horizon around the rover.
Shoot a three-sixty from altitude.
That raises a question.
How rapidly does the air get thinner there as the altitude
increases?
That might be a factor in it flying very high. I honestly
have no idea.
And just over that hill, it reported . . .
Courtesy Twilight Zone's "I shot an arrow . . ."