I also think that Biden/Harris ticket was intended for certain purposes from the very start. Placeholders

OPs asssertions are assertions and are not held up by law or precedent.

The constitution itself does not define natural born citizen.

The accepted standard (by the supreme court, etc) for a "natural born citizen" is someone born in the USA (regardless of the citizenship of the parents) and who does NOT need to go through a naturalization proceeding.

https://www.law.cornell.edu/wex/natural_born_citizen

A natural born citizen refers to someone who was a U.S. citizen at birth, and did not need to go through a naturalization proceeding later in life. Under the 14th Amendment's Naturalization Clause and the Supreme Court case of United States v. Wong Kim Ark, 169 US. 649, anyone born on U.S. soil and subject to its jurisdiction is a natural born citizen, regardless of parental citizenship.

Also, her Jamaican citizenship is not an issue, from a legal standpoint.

https://jp.usembassy.gov/services/dual-nationality/

The Supreme Court of the United States has stated that dual nationality is “a status long recognized in the law” and that “a person may have and exercise rights of nationality in two countries and be subject to the responsibilities of both. The mere fact that he [sic] asserts the rights of one citizenship does not without more mean that he renounces the other” (see Kawakita v. U.S., 343 U.S. 717 [1952] ).

It may be a bad law, but its the law.

I can see how BADLY OP wants to be right about this, but its a dead issue. OP's opinion is not equal to the law.