The price of wine is determined by price of grapes. To achieve low price of your input you need vineyards that are hugely productive (say 10 to 20 times of those used for quality production). Even vineyards used for high quality production need a lot of chemical inputs (compared to rest of agriculture), but here we need to go even higher due to high density of grapes and zero green management.
All of the vineyards are optimised for mechanical prunning, management and harvest. No problem with that and we are also seeing this trend in more and more premium wines due to rising cost of work and technological progress.
At the end of growing stage we are having grapes that are not that ripe: probably not a lot of sugar, harsh tanins, lots of acids (and also structure of various acids will be on harsh acid types) and probably some rot on wines (this is normal even in high quality wines).
No problem with any of those parameters: low sugars could be fixed by infusing sucrose, acid could be removed by using potasium bicarbonate, tanin structure could be improved by using artifical tanins (or tanins extracted from wood), color could be fixed by acetaldehyde (cause of headaches, together with high SO2 levels) and whole structure might be balanced by using reverse osmosis.
After use of ten or maybe 50 different additive you get your $2 bottle of wine-like drink. It might even taste good.