If most Mexicans have 30% Native American ancestry then why don’t they seek the same benefits as native Americans?

Typical dna for Mexican is 65% European, 30% Native American and you need 25% Native American at least to be considered to join a tribe.

I am not sure about dna percentages of other Hispanics though.
If most Mexicans have 30% Native American ancestry then why don’t they seek the same benefits as native Americans?
If most Mexicans have 30% Native American ancestry then why don’t they seek the same benefits as native Americans?
If most Mexicans have 30% Native American ancestry then why don’t they seek the same benefits as native Americans?
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