Even without the factoid above the number of assumptions you have to make for the plausibility of the explanation strains this readers credulity. (At least....)
You have to assume that Jesus either didn't know that at least a couple of his disciples had swords. or had been perfectly okay with it up to that point.
You have to ignore the clear meaning of the metaphor, καὶ...πωλησάτω τὸ ἱμάτιον αὐτοῦ, and assume that Jesus seriously expected his disciples to go out in Jerusalem on Passover and conduct this transaction if need be
And you have to interpret the references to a purse and food pouch under an entirely different rubric even though all three items are listed in the same context.