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That's right. Eject buttons have a reason. You know for what? For ejecting something, not inserting. Just push the lid gently and the drive will do the rest.
Well, that's not all that accurate. It is called an "Eject" button, because it is easier to say than "Eject/Insert" button. "Insert" button isn't as easy to say as well. And if you remember, back in the day when the term "Eject" button was coined, all that was around was floppy disks, and they could only be ejected, to insert them all you would do is push the disk in the slot (not press a button).
I don't see how anyone can argue that it is better to push the tray in and force the drives recovery mode to take over the process of closing the tray, than to just click the button and let it handle it on its own... I mean, sure, lots of consumer products block access to that eject button on optical drives thesedays, but that doesn't mean its the optimum way of doing it. I personally won't buy a computer case that has those stupid covers that obstruct access to the optical drives for just that reason...