Fediverse makes improvements on existing social media formats, but there are so many issues inherent to online social media that cannot be fixed by slightly changing the format.
Short-term, consequence-free interaction with strangers is not a substitute for actual social interaction, but it’s become one of the default modes of socialization in the modern world. It’s a bell that can’t be un-rung, but moving from reddit to lemmy isn’t going to mute it in any significant way either.