Sometimes you just get the right one ;-)
Of course there is less cultural diversity than the EU - but the uniformity of law and culture makes moving between states even easier than the EU.
For example a green card holder can reside one year in each of five different states and that will count as the 5 years residence necessary to naturalize as a US citizen. If an EU permanent resident moves between countries like that, they'll never stay long enough in any one country to gain citizenship.
Imaging if the Alabama state government could sell US citizenships and pocket all the proceeds themselves! Definitely creates weird incentives.
Suppose you wanted to settle in a different continent. Country outside of the US or the EU.
Suppose some issue happened in your country or region that you did not agree with?
Suppose you wanted to give up EU or US citizenship.
Multiple passports give you damn options.
A French passport is hardly the “right one”.
The whole world is not the euro or anglo countries. There is plenty out there to enjoy or explore or move to.
You should check out the Nomad Capitalist channel on YouTube for an even wider view on all of this.
Open your horizons.
Multiple passports, in 2021 gives you options that are invaluable. You can establish homes in 3 countries. In case of emergency in one country you can go to another 2. You can enter countries that exclude citizens with one or more passports.
There is so much to be thankful for with multiple citizenships.
The one major downside is U.S. Taxes.
Be very grateful to your parents and self-initiative.