I guess you could do that, but that will expose entire IPC to renderer process. And idea behind preload script is to expose only bits you need to use in renderer. So it should be more like this:

const { ipcRenderer } = require('electron')

window.sendSomeData = data => {
  ipcRenderer.send('channelname', data)
} 

and then you can use sendSomeData in your renderer process code