Maybe, but then, at what point could the illusion have been substituted for the reality, if Kirk and "Mendez" were together the whole time from the starbase to the shuttle? The answer is of course at
any point. We can never be sure, much as we cannot with respect to virtually
anything presented to us in this story, from beginning to end. Just how deep does the rabbit hole go? No way of knowing. Was Spock indeed lying about receiving a message from the starbase, or did he rather receive an illusory one? Was Pike even ever injured at all, or was this
all the Talosians'
second—and this time quite
successful—attempt to entice him into their menagerie with an elaborate ruse? If their powers are as potent and far-reaching as is alleged, then they are certainly capable of it. And it would make a fair bit more sense as a motivation for their purported machinations here than it all being simply out of the goodness of their shriveled hearts! Ultimately, as
@Timo pointed out in a previous discussion:
"Whatever the Talosians did, they won. By definition. If we thought otherwise, that's only because the Talosians wanted us to."