Yeah, I'm pretty sure that's for rotating the inner tie rod when adjusting toe, not for replacing the inner - though I do love purpose made tools.

I do a lot of track days and racing, so my toolkit is usually pretty minimal since I don't own a semi to haul my tools over. My rule is usually "make do with what you have twice. If you're still swearing the second time, go buy a quality dedicated tool and find room in the mobile tool box".