The intent isn’t to have Peterman as an option to start after Carr. It’s strictly to prepare Haener for the next 5 months through competition. Hill would start for a game if necessary if we weren’t comfortable with Haener by then which we should be.
It all seems pretty rational to me (which probably has no place on a message board).
They like Haener, and feel pretty comfortable with his as QB2. They don't want to hand it to him so they're going to bring in a low priced QB familiar with the system and coaches. Plus more arms are needed for TC. We might well bring in an UDFA type to camp.
At the same time they probably identified a QB or two about whom they said, "Even though we feel good about Haener, who are the guys we would put on the 54 ahead of Haener if we could sign them? Flacco was such a guy, and they apparently reached out to him.
Just because we looked into / reached out to / went after Flacco...
doesn't mean we don't like Haener.
doesn't mean we were heck bent on landing a top tier QB2.
doesn't mean we swung and missed horribly at everyone and landed Peterman.