Sure you can. Also, if I post a comment in your blog saying that you are so smart unlike, say, Joe Rogan, who is eating horse de-wormer trying to cure his covid

Sure you can. Also, if I post a comment in your blog saying that you are so smart unlike, say, Joe Rogan, who is eating horse de-wormer trying to cure his covid and you don't delete that comment then Joe Rogan may sue you for defamation. Compare with YouTube, where anyone can post a video saying the same and if Joe Rogan came after them, YouTube would claim section 230 protection, insisting it's not selecting content and hence it's not responsible for the user's content. Many people would be fine with YouTube or any other social media company censoring whatever it wants if it also had been liable for the content it leaves uncensored. As of now, it's having the cake (censoring anything they want) and eating it too (not being liable for the content that's left).