I believe they are something you have to continually fight for, and that can only be secured by a functional government (which itself is something that requires constant maintenance), vs something you can truly secure for yourself.
And in the particular case of the second amendment, I believe we are in a situation where a "right" granted by our constitution impairs on a right to live freely, free from interference and harm from others, that I personally consider more basic and more essential. The Constitution doesn't have an amendment discussing a right to not get shot, but I don't think that makes it less important.