You paint a patently false picture of the justifications for getting this "piece of paper". There are benefits to having a birth certificate, but they lie solely in bowing to the state, and absolutely nothing with regard to "protection" or laughably, preserving "freedom". Moroever, I would classify the pain and anguish that you so happily avoid as no less than a ethical self-sacrifice that should be applauded and emulated by those who appreciate individual liberty. To see you classify an ethical self-sacrifice as unwanted "pain and anguish" betrays a viewpoint with little regard or concern for individual liberty.
First - how does getting the paper provide any protection? It may make dealing with the bureaucracy smoother - but that is hardly a measure of protection.
Second - Future pain and anguish? Pure hyperbole. And your "symbolic victory" is nothing more than a value judgment - and has no moral weight vis-a-vis someone you have no personal knowledge of, no awareness of their circumstances, or no comprehension of their own values.
Third - "their future freedom under US and state constitutions" This is quite an outlandish statement. What freedom is being enforced today? The only freedom I see enforced under any constitution is the freedom of the government to take your property and control what you do with your life - a complete anathema to freedom. Every one of the bill of rights has been voraciously eroded in past decades, and yet people still perpetuate the falsehood that the government is here to protect your freedoms. Bologney - that is what the Declaration of Independence mandates - but that is NOT what is being enforced today. Quite the contrary.
The ONLY argument in support of getting a birth certificate is to make dealing with the bureaucracy smoother. Because the bureaucracy is ubiquitous throughout American life, that is no small measure, I readily concede. However, deluding yourself and others into believing that kow-towing to the government somehow delivers protection, avoids pain and anguish and God-forbid preserves freedom(!) is quite extreme and simply untrue.