Absolutely correct. Anyone who is a citizen by the operation of the 14th amendment, is a naturalized citizen, not a natural citizen.
Though I think it is wishful thinking that the Supreme Court, as it is currently constituted, would do anything more than rubber stamp what "everybody knows" in the legal community. Meaning they would decide it incorrectly.
“I do not stand here to cavil with men who are not read in the horn-books of the law; but I assert that every man born within the limits of the Republic, or under its flag at sea, of parents who were not the subjects of any other sovereignty, are, in the very words of the Constitution, natural born citizens”
John Bingham, framer of Amendment XIV that made Obama, Harris, Haley and Vivek US citizens
from the Cong. Globe, 37th, 2nd Sess., 407 (1862)
https://memory.loc.gov/cgi-bin/ampage?collId=llcg&fileName=058/llcg058.db&recNum=64
Enter in 407, click Turn to image, and look at the end of the first and beginning of the second column.
The Democratic voters are in actuality voting for electors for Harris.
The electors might still remain qualified to elect a Democratic president even if such a person can’t legally be Harris.
Of course, once the electors for Harris vote, they almost certainly can’t reassign their votes.