Is current React/Redux development infrastructure overcomplicated?

I have been using Alt/React which is pretty simple and straightforward. Now when I looked at :

• React
• Redux
• Redux-thunk
• Redux-saga
• code splitting
• webpack loaders
• css modules
• iso-fetch

etc...

It messed up my head. Why aren't we better off with a simple React/Redux set up? Why so much over-complication?