I thought the medical consensus these days is aligning on mouthwash being actively harmful? Kills good bacteria in your mouth, increases risk of oral cancer, etc.
https://en.wikipedia.org/wiki/Listerine
Personally, too weak for me; I gargle with moonshine.
Using alcoholic mouthwash is bad for the same reason taking antibiotics is - and you may actually want to take oral probiotics for the same reason the ones you eat are healthy. Though I don't know the current state of evidence for them.
Mouthwash is a very American phenomenon though, AFAIK it's not used as commonly anywhere else in the world. Which suggests at least part of its American popularity is due to marketing.