If it wasn't for capitalism you wouldn't have the computer, internet, or home to send this message from. All capitalism is at its core is the right to keep what is yours.
This is such a fucking stupid and ignorant argument to make. Labor produced these things. Human intellect and creativity produced these things. Capitalists just took most of the money.
What do you think drove people to make and produce them? The fact that they would get stuff (money) in return. No one creates when the results of their work are taken from them.