Because sometimes devs might not be listening/talking to others, and just need someone to organize an offline discussion to unblock them.

I have been to a team where X would need help on something that Y has solved in the past, Y does not care to listen in the standup and volunteer to help, and i had to ping him “Hey Y you have resolved this in the past, care to help X after the standup?”

Shitty standups go bidirectional ways. Managers can make them terrible, but devs can do that as well.