I see you point but I think you are being harsh here. It is clear that it is not to be taken literally that Mastodon is nothing like Twitter in therms of looks. I think the spirit of the OPs comment is that it is the style of conversations, atmosphere and culture that each of them foster what makes them somewhat different.
This post is Meta.
On a serious note, can we appreciate Meta’s marketing team for the timing of this announcement. They waited for Twitter to bleed to kick it in the shins.