[flutas]

IMO:

It's called "who wants to be hired" and typically has appropriate information about their profile so that someone can decide if they fit the role they need to fill.

It's not called "who want's to be spammed by an automated system that can't tell if you're a 16 year old JS only frontend dev or the engineer we actually need."

The difference is filtering. If they spam (and that's what it is when it's sent to everyone sight unseen) everyone then it makes the "who want's to be hired" threads worse for everyone.

EDIT:

To put it another way, if your company has a referral bonus you don't send them your entire rolodex of contacts for them to cold call. You would typically send them specific people you think match the role they need to fill (of course after verifying with people, etc).