Pretty simple really. “Serving“ money as someone “serves” their God is its own end purpose. It is worship as though the money is your God and the most important thing.

In contrast “pursuing” money can have many other purposes including being generous to others and helping the poor and needy.

Beinf “selfish” is not the same as tending to your own “self-interests” or personal needs. Same reason you have to spend time becoming healthy in order to serve others well, or put your oxygen mask on first to breathe in order to help many others breathe. It scales well too. The more fit you are and the better you can breathe the larger the masses you can help.

So the purposes of pursuing money for generosity align well with the purpose of capitalism—to provide mutual benefit and ongoing increase to all through simple free fair trade, and fostering increased freedom, agency, responsibility and mutual respect (and love :)).