the issue is that native american tribes have a legal relationship with the united states government that requires documentation of its members. so while it may seem ridiculous to you, native americans who are legally enrolled in a tribe are quite familiar with providing this kind of information and it really doesn't feel like an inconvenience if you are, in a legal sense, native american. so it doesn't necessarily feel like jumping through hoops if you are already an enrolled member of a tribe with legal documentation. so you have to remember the special legal relationship that the united states government has with indian tribes when considering what is ridiculous or not and when drawing comparisons to other races/ethnic groups. so claiming that you are native american for the purposes of applying to law school is not as easy as checking a box.