Smoking while breastfeeding?

I used to smoke weed daily before I got pregnant but decided to stop. I’m wondering how you all feel about smoking while breastfeeding. So far like other debates on weed nobody can come up with a reason why it’s unsafe for baby’s health. I know morally people say it’s so terrible but seriously how do you all feel? I’m thinking after she’s a month old I’d like to start for medicinal purpose but my main focus is being the best mom to her so no rude comments!