Rate-limiting things to human-speeds is fine.

The issue with Twitter rate-limits is that 600 tweets per day is doable in just 2 or 3 minutes of scrolling. Well within human limits.

Such a click bait title.

Lemmy has ratelimits also its what sane people do, you ratelimit how fast people can submit posts to prevent bots from flooding your site with spam.

Read ratelimits is crazy town Post submitting ratelimits is sane spam policy