There are valuable things going on with both of these rants, as it were.
1) Having your players say what their PCs are doing is a bit more immersive and gives the DM a chance to determine what stuff is freely observable, not observable, and uncertain - which is when the perception check is of use. I think these are worthy goals.
2) But players generally do think they're being helpful in shortcutting to the mechanics rather than drawing things out and that's not just a 3e-ism, or even a 4e-ism. That's been around as long as RPGs have been around and had checks for things that players knew about.
If you want things to be more immersive and players describing what their PCs do without the shortcuts, keep emphasizing it patiently because you all know damn well that players are as stubborn in their ways as DMs are in complaining about them.