Why does an async method needs to return a future?

async and await don't make async execution sync. There is no way to do that.

All async and await does is to make async code look more like sync code. It is just syntactic sugar. Everything that can be done with async and await can be done without it as well.

Instead of deeply nested .then(...then(...then(...).catchError())).catchError(...) distinct statements, for loops, try, catch, finally can be used which makes code easier to write, read and reason about.