How does Joe justify repairing and then shipping the cracked heads?

From the text:

"You're a boy, what could I do! I'm in business, a man is in business. A hundred and twenty cracked, you're out of business. You got a process, the process don't work you're out of business. You don't know how to operate, your stuff is no good, they close you up, they tear up your contracts. What the hell's it to them? You lay forty years into a business and they knock you out in five minutes, what could I do, let them take forty years, let them take my life away?"