Theyre meant to deliver emphasis on the words so you don’t read it all monotone in your head. For example maybe “wow, okay. RUDE” but all bold comes off as being too aggressive. I personally think it enhances the post. Also, if you can’t handle them, down vote and move on.
The only sector that might be worse is middle management data processing like the Healthcare sector. Doing a pointless job like that all day every day is soul sickening.