I can understand this point of view if you're an unknown with opinions where being on a platform with algorithmic feed and many users can give you some exposure.

But when you are a national level public figure, any micro blogging tool, even one fully dedicated to yourself would be equally suitable. Nobody at that level benefits from being on Twitter.

twitter lost critical mass and network effects years ago

X does not have "critical mass". It could disappear tomorrow and it wouldn't make a single bit of difference.