Why are CAs needed in SSL?

Question

Digital certificates

Asymmetric encryption does all the work of securing HTTPS traffic. Those. it is enough that the server sends its public key, with the help of which the client encrypts the key of the further session and transfers it to the server. That's it, traffic is protected from man-in-the-middle attacks, and no certification centers are needed.

So what problem does all this extra fiddling with certificates solve?

Answer 1

So that it is impossible to forge a certificate and be sure that there will be no mitm attack