He didn't misunderstand the analogy, it's obvious what was meant. He's pointing out that comparing Musk's intentions to slavery is absurd, which it is. It's a crap analogy because:

a. Nothing Musk is doing or wants to do with Twitter is immoral.

b. Even if you disagree the scale is totally wrong, but in analogies the sense of scale matters.

Yeah, rsync (great username) is correct in my meaning