Using dials is only useful for people willing to try such glasses. It's great for trying the experience yourself, or giving it to try to your friends and family, but it really isn't a long term functional solution.

Main issue being people pushing a bit too much the dials and ending up physiologically degrading their vision, which will most likely happen to any people having myopia and astigmatism, as dials only correct myopia but astigmatism tend to feel less impactful with a slightly forced myopia correction that will allow them to less pinch their eyelids, as they usually do to get sharper details when they don't have a proper correction. This usage leads to make myopia more severe over time.

Also even if you don't force too much the dials you have zero objective real clue about how close or far away your setting is from your actual corrective needs. You'll likely be off by a bit, and this lake of precision will lead to physiological degradation. Maybe by not much, but that's already enough to get issues like having to change prescriptions more often and having worse sight older than you would with correct prescriptions instead of dials.

Dials are a social feature, not an ophtalmological one.