Here is something to consider; imagine if the VT were extinct. What genetics would breeders use to make betta fins longer.
Out breeding to wild bettas create short tails like the plakat. Once breeders are satisfied with the color they've come up with, they would introduce other tail types. Look at the HM's, very few have tail as long as their bodies. Nowadays most bettas tails are only half their body length. Look at the new type of double tail, its rather short. To produce longer fins, long finned genes must be introduced ..... the VT.
Still imagine, there are no VTs. LFS will only cup other available tail types..... so problem not solved. VTs (IMO) are as beautiful as other tail types. Further more they are cheaper which is ideal for beginners. Yes, perhaps you may have to use bettas as fish food. But don't you use guppies as betta food? What's the difference?
IMO - responsible is for beginners not experimenting with tail type without certain goals. Beginners should use breeders of the same tail type (whatever type). Then if more experienced, they could experiment and try create new and or better tail type or color.
Quality is merely something that pleases our eyes and heart, thus its very subjective according to the individual judging.