No, you didn't.
Residency alone does not make you eligible to play for any international team - it is a prerequisite that you hold the Nationality of the country you wish to represent.
That is not "wrong".
I have not intimated at all that Irish Citizens are not able to take up Citizenship of "certain other countries".
You have failed to answer the question posed in that regard, preferring to revert to the standard "so what".
I'll ask for the third and final time:
What other countries can a kid born and resident in Dublin choose to represent (assuming his parents and grandparents are solely Irish Citizens)?