The framers appeared to disagree with your assessment since they worked to prevent divided loyalties with the Constitutional eligibility requirements and discussed it in their letter exchanges which have survived to our day.
The Constitution makes no mention of dual citizenship being a bar to the Presidency. If the FF wanted to ban dual citizens from the Presidency, they would have so stated in the COTUS.
and discussed it in their letter exchanges which have survived to our day.
The letter exchanges are interesting, but they do not override the plain text of the COTUS.