I usually help bag my stuff if there isn't someone there already to help. I really don't mind and it gets me out of the store faster + helps the next person get

I usually help bag my stuff if there isn't someone there already to help. I really don't mind and it gets me out of the store faster + helps the next person get through faster. I don't understand the mentality of just standing there helplessly waiting for someone to come. It's really not that difficult. It feels like the same energy as folks who can't be bothered to throw away their trash at counter-service restaurants and cafes that do not actually have people whose sole responsibility it is to bus tables. Is it really putting one out that much to carry their coffee cup and napkin with them as they walk right by the trash next to the door on their way out?