Some of it is. Importantly social media allows for a reasonably quick back and forth on even terms that a blog doesn't really allow for. The quality of that discussion is of course dependent on the userbase.
If we take lesswrong, the rationalist/ EA blog famous for Roko's Basilisk that brought Grimes and Musk together as an example, Yud spent years growing a cult of sycophants for his bs ideas on AI risk. Now that he's taken it to the arena of social media, people have been taking him apart in a way that never happened on his site (that he could of course ban you from).
Forums are better for these discussions, but they're also basically dead thanks to reddit.