I've always figured pre-rolls are for tourists, people trying to smoke on-the-go and really casual smokers who don't know how to roll and don't have any glass.

I don't know why they're all like a gram each. Probably just easier to roll for walking-rasta-stereotype tolerance levels than to try to forecast and maintain inventory at multiple sizes. Most shops weigh our flower when you order but they're usually not rolling a J for you on the fly.

best thing to do with a one-gram preroll is to unroll it and smoke it some other way, but then you might just as well buy a gram of flower...

In the time it took you to write this you could have rolled your own joint.