I’d wager they’re not…
Especially in your neck of the woods
I know I wouldn’t destroy actual live resin by loading it in a 6gram cart.
If you want better than 20% yield, you’ll need input at greater than 20% cannabinoids.
You’ll also need to know what you’re doing, and get it right every time.
You don’t, so you won’t…
From an econ 101 perspective, the trick is to use flower you can’t sell.
Once you’ve got your Rumpelstiltskin act perfected, you might be able to charge the premium required to afford destroying high quality input. Maybe.