It nowhere says that.
There's considerable doubt that the 3000 baptized in Jerusalem on Pentecost could have been baptized by immersion, because there is no body of water in or near the city where that could easily be done.
Considering there are were at least 4 pools in Jerusalem at that time that would have had enough water for the baptisms, I don't think that your argument would, excuse my pun, "hold water".
And once again, to claim that the universally accepted meaning of a word has no bearing on the proper mode of baptism is a very weak claim in my opinion.