This might be a good catch! Dominguez (and Shaquem Griffin- who was a phenomenal one handed football player at a D1 school, UCF and played 4 seasons in the NFL) are great counterexamples to a general statement. Sometimes we will see a general statement that appears to go along with common sense- but one reasonable counterexample like Dominguez and Griffin could be enough to disprove it.
On the other hand, if we saw an argument whose premise was "All great basketball players have arms" we would indeed have to accept that as true regardless of our outside knowledge.