The first thing that you said is the true purpose of the bots, and the rest are just an addition. But whether using a bot or not, a trader can still expect more, especially if he thinks the strategy that he uses are really good. If he doesn't have his own strategy because he still lacks of knowledge and skills, he can use someone's pre-configured bot and he can expect the same thing, especially if the bot owners promised them that their bots are highly profitable.
Of course, you're right. But if you copy someone else's strategy anyway, I wouldn't call that trading, for me that goes under "copy trading". Such features are sometimes also offered by well-known exchanges/platforms.
OKX is a cryptocurrency exchange that provides a user-friendly copy trading platform that enables users to select and replicate traders. With OKX copy trading, you can share your best trading strategies for rewards or learn and copy trade across more than 600 trading pairs with our lead traders worldwide.
SourceBut the learning effect of copy trading is zero, you have to blindly rely on the fact that what the trader you follow does is also sensible and successful. To be able to assess this, however, you need experience. I therefore consider copy trading to be a nice gag, but I would never invest money in it myself.
Disclaimer: Of course, this is not meant to be an advertisement for OKX, I have never used the service myself (and don't plan to do so).