In theory professional libertarians are against welfare, in reality they promote it through their actions. Open borders – a pathway to welfare. Encouraging youth to have sex knowing full well they can’t support themselves. Pretending that drugs don’t create dependent citizens. And so on.
Now there’s an exercies in socialism - you’re responsible for the consequences of anything you didn’t prevent someone else from doing. Nice.
The "actions" of libertarians are nothing like what you suggest they are, and you ascribe to libertarians all kinds of beliefs that they simply don't have. I think perhaps you don't understand the difference between liberals and libertarians, or maybe you are really just a good old fashioned right wing statist - the kind who deep down in their hearts wants a big government that intrudes into everyone's lives.