The “front page” of most instances are not interesting to average people or to professionals (e.g. local gov that wants to go open source, like those switching to Mastodon).
Part is lemmy’s hot-sort is basically broken as a ranking, another part is bad language filters, another part is that major communities here (fediverse, Linux memes, star trek memes, science memes, etc) are off-putting to out-of-group people because of so many in-group jokes. Its a hard fix.
Celebrities are going to be shocked when they hear about email