I’ve kind of understood “dealer” to be someone who sells illegal drugs, and “budtender” to be someone who works the counter at a legal dispensary. I dunno for sure, I don’t actually encounter these concepts often.

It does seem kind of silly, I mean we already have words that describe people who work in stores. On the other hand, it’s specific and easily understood from the first hearing.

A dealer is Packer and a budtender is Dwight.