Capitalism protects me from being abused or forced to work for someone else.
Sorry to break this news to you, but it doesn't. Unless you think dieing by starvation is acceptable as alternative.
There are others forces than those by persons.
So you can talk about "non aggression principle" all day, the fact is you are completely ignoring those other forces even when they can be just as cruel as the "aggression" you hate so much.
It doesn't matter how noble the intent, it doesn't matter whether you are helping childhood cancer or keeping one person from starvation, to use
force to take the product of somebody else's labor is to commit an immoral act. The moment you violate this simple primary, you open up the proverbial slippery slope to more and more regulation, taxation, enslavement. There is always some sad story that has to be alleviated. There is always somebody making gobs of money "they don't really need" to use the force of government to steal from. The world has a huge entitlement class. There are billions in taxation stolen from productive citizens worldwide to "provide relief" for the poor. Has it helped? I say no. Even if it does help few, it's not worth it. Immoral = immoral. No matter how big or how small. A million tiny wrongs do not make a right.