Comment by BLKNSLVR

The purpose of chat bots is profit (which could well be argued to help a select few people).

Alternative take: The purpose of "thing" is "what it is used for", which is a crude variation of "the purpose of a system is what it does". Reducing it to a single definition is almost always going to be inaccurate.

The way it is used defines it's purpose. The screwdriver was used to open the milo tin so the milo could be removed from the tin. The gun was used to make a hole in the milo tin so the milo could be removed from the tin. Purpose is a per-unique-scenario proposition. The best tool for the job is the one that's available.

To intentionally misquote Arthur Weasley: "What exactly is the purpose of a rubber duck?"