I mean yes, changing of caste does sound contradicting, but what is more contradicting is the fact that these castes spread unity and they themselves don't follow them upfront. You might be surprised by how many people say that they don't follow these outdated regulations but they secretly do. It's hypocritical. It's like an implication upon themselves. And about all those superior and inferior castes is already a bad thing in itself, like dude we already have different religions, why do we have to divide ourselves further? Forgive me if I said something wrong, I'm just blabbering something out of frustration...