Early flying machines tried to mimic the flapping of a bird wing. Innovation and science came up with a much better solution.
What is the top speed for a bird? 100mph? A fighter jet can do many times that. If speed is the goal, the fighter jet has the bird beat.
Bottom line: depends on your goal. Nix the overhead of an ecosystem.
There are other factors to be considered too. Can a human survive outside of an ecosystem.
Short answer, no.
Longer answer, If you know EVERY micronutrient a human body needs, and can make it in a factory, and you have the industrial ecosystem to feed and repair that factory, the body can be sustained.
Whether a living body with no other living things to interact with is still a human being is an exercise left to the reader.