Yes, OOH, that's true, but God was trying to spare us that penalty (eternal death), so that he came up with another means to do so. Don't forget, men still die, so Jesus did not really take our place then, did he?
We must get used to the way that the Bible speaks sometimes, if one would really pay attention, they would appreciate, for example, how the Bible very often uses hyperbole our very broad statements, when the meaning is actually something much less inclusive. But, more so in this case, one cannot be so literal because the logistics are clearly implausible. That's our clue.