I agree in part, but I also disagree. I think language exchange have benefits that a language tutor doesn't offer. For example getting a deep understanding of the culture through making genuine friendships with people that speak your target language. A tutor is only good for how much you can afford, and college students especially finding a language partner might be more worthwhile. However for those wanting a deeper understanding of grammar, a teacher or tutor might be better, especially for beginners. All and all I think there are many factors that go into play, how much money I'd in your wallet, how far you are in a language, and what exactly are you looking for at that moment.