There’s already evidence for it. There are contemporary accounts describing the practice. These accounts aren’t perfect. Not necessarily first hand eye witness

There’s already evidence for it. There are contemporary accounts describing the practice. These accounts aren’t perfect. Not necessarily first hand eye witnesses, but not rumor mongers either. So anyone arguing that this didn’t happen needs to address an established consensus. Lots of more recent research is attacking traditional ideas about the Spartans, so this is a welcome argument. But saying “it’s on them to prove their point” isn’t really helpful.