Sure, rights are a construct not some sacred law of the universe. They're also the basis of civil society, which, again, is an artificial construct - essentially an agreement or (social) "contract" between individuals and the state.

So you can try to undermine that agreement by saying "lololol the universe doesn't care about you," but you're not really a part of the conversation. You're crushing bugs in the dirt while people are trying to get shit done.

If we all agree to say "fuck it, everything is worthless and no one even desrves the right to life" then the world collapses and you're out there fighting tooth and nail for leftover hot pockets in a decimated parking lot.

If you're the kind of person who likes to pretend that would be a great alternative to life as it is, then you're either running a prison gang or kind of a loser. News Flash: if you're not making the cut or getting what you want in the cushy embrace of modern life, you're not going to be Genghis Khan when the wall falls. You're going to be a head on a pike.