HTupolev

Long ago, shifters were not indexed. Instead of having two positions, a front shifter would have a continuous range of motion. To shift, you moved the shifter until the derailleur bopped the chain to the other ring.
If the chain started rubbing the front derailleur after you made a rear shift, you could use the front shifter to nudge the front derailleur over so that the rubbing stopped.

Obviously your R7000 front shifter doesn't have a continuous range of motion like this. But it does have more than two positions. When you're on a chainring, you should be able to lightly click the shifter between two "trim" positions without shifting to the other ring. If everything is set up well, and you know how to make use of the trim, this should allow you to minimize rubbing.