To return an old but still good analogy ...
If you want to understand how birds fly, the fact that planes also fly is near useless. While a few common aerodynamic principles apply, both types of flight are so different from each other that you do not learn very much about one from the other.
On the other hand, if your goal is just "humans moving through the air for extended distances", it doesn't matter at all that airplanes do not fly the way birds do.
And then, on the generated third hand, if you need the kind of tight quarters maneuverability that birds can do in forests and other tangled spaces, then the way our current airplanes fly is of little to no use at all, and you're going to need a very different sort of technology than the one used in current aircraft.
And on the accidentally generated fourth hand, if your goal is "moving very large mass over very long distance", the the mechanisms of bird flight are likely to be of little utility.
The fact that two different systems can be described in a similar way (e.g. "flying") doesn't by itself tell you that they are working in remotely the same way or capable of the same sorts of things.