There is no doubt other cultures sailed to the America before Columbus but for whatever reason they either did not colonize it, or tried to but failed.
So whether the phonesians found the America’s before Columbus or the Chinese did doesn’t really change the course of human history.
Even if that were true, which it's clearly not, since there is no "course of history" / historical inevitability and (other than among the Mayans, who had writing) no precolumbian history at all (since history requires literacy), it certainly does get brought up a lot, pretty much word for word, in pretty much any topic about precolumbian navigation.