"In other words, I actually understand git, so I don't really need Jujutsu." sounds like jj is for people who don't understand git. That's naturally a contentious statement. It implies that jj doesn't offer anything to experts, which seems easy to contradict given how many people with git expertise will talk about getting value from jj. At worst, it could be taken as a bad faith kinda put-down, like, suggesting at jj users are worse at their job than people who make do with git. I think it's totally fair to take push back against how that was worded.
Why? They’re sharing what they prefer in response to someone claiming that everyone who tries the other thing comes to prefer that. They’re offering a reply in context and not in the slightest saying everyone should follow what they do.
> By all means use what you prefer!
That’s exactly what they’re doing.
> But understanding git and knowing the "right" way to use it doesn't make jj obsolete.
Which they haven’t claimed at all.
You seem to be objecting to an argument which hasn’t been made.