Post and article for reference: https://www.reddit.com/r/todayilearned/comments/jad20j/til_ancient_sparta_was_an_incredibly_brutal/
While obviously there's more to be said on the specific piece and question, while you're waiting you might be interested in basically any answer on Sparta written by /u/Iphikrates, which you can access on the wiki.
Particularly his answers to:
What were other people's impression of Spartans?
Is the Military "Worship" of the Spartans Really Justified?