I love Lemmy but your question is legit. I just signed up with lemmy.world because lemmy.ml is slow/not responding.

Before making a post in lemmy.world guess what? lemmy.world isn’t responding. I know they have scheduled maintenance at 9 CET but it was 20 minutes before that.

I agree that score is not indicative of the quality of posts. However, it’s useful to measure what people who read this post or comment think of it positively or negatively or neutral.