The fact that that right is enumerated in the Constitution is a bonus, not the genesis of that right.

There, I answered your policy question. Now you answer mine:

As a policy matter, why do you want everyone who can travel here, legally or illegally, to be able to create a US citizen?

I understand that the enumeration of that right in the Constitution is a bonus to you (and the genesis of that right). But why do you want non-citizens to have that right and power, apart from the Constitution?