We use it in space too, we just send food and manufactured products down the elevator.

You aren't really trying in good faith to think this through are you? This idea is over half a century old. Not getting it by now is willful.

The more I think about space elevator, the less I believe in it.

The material alone is in a quantity beyond what we can reasonably manufacture.

and the material needs to be perfect. All design we have today have cascade failure mode -- any material failure translates to a total catastrophic failure.

and geostationary does not really meant Geostationary. There are lots of jiggling everywhere. It wear down over time. and let's hope nothing resonance

and we need some maintenance / decommission plan. How can we decommission this when it fail or need upgrade?