Nah, Garp's out of excuses.Yup. Im just spitballing about why he started down that path. He may not have even known all that shit for much of his life. At a certain point I think the sunk cost fallacy took over.The government he serves does WAY more damage than almost any pirate ever could.
Also, most countries in the world aren't even part of the World Government and even then, the Government lets countries be fucked over anyway if it suits their purposes.