> No one will bother. Because this does not affect citizens.

I, a US citizen literally JUST spoke out against the practice in the post you are directly replying to.

What rights are those exactly?

How does it violate the rights of non US citizens? Non citizens have no inherent right to enter the US. Applying for a VISA to enter the US is a voluntary act, therefore, a non citizen is completely free to chose whether it is worth providing this information in exchange for possibly being allowed in the US.

People that are upset about this being asked have obviously never had to complete a VISA application to the US or likely any country. The US and most countries ask far more intrusive questions.