how so
Discussion
If at some point a message gets intercepted (e.g. via some form of MitM attack), decrypting one message would not mean the whole conversation is compromised.
so your concern is that a TLS connection would get MitM attacked?
Depends on the TLS connection ;-)
Also "e.g." stand for "exempli gratia", which means it's just one example. there are several ways a message could be intercepted. Using forward secrecy means each message would have to be decrypted independently. Cracking one message would not give you access to the whole conversation.