"I have an idea." Of course you do, Michael. Yeah. Me too. Spore drive Discovery into the heart on the Breen ship and fire all phasers! Destroy them from within! You almost did it to the Klingons, only this time, pull the full Janeway! Blow up the Breen to smithereens!
Except they'll still have to deal with the Breen the next day. They're not in some different, remote area. And other powers probably had trade with the Breen and it's going to effect them too, and they'll look at the Federation. They'll do something else.
Could be the females of the species don't have that any more than (if she's an Efrosian) the Fu-Manchu mustache.
Preview images for Episode 8 https://blog.trekcore.com/2024/05/new-star-trek-discovery-photos-labyrinths/
Culber: Klingons!!! NOOOO!!! (shoots the alien down with a phaser that may or may not be on stun) Burnham: Dr. Culber, that was not a Klingon, that was an Efrosian! Kovich: I shudder to think what Dr. Culber would be like if he lived in the 2260s when practically every Klingon in their military looked like a human.