It is like saying nobody can ship B2C like Amazon does, while ignoring the fact a very big junk of shipments is handled by the likes of DHL, and ignoring all the 3PLs Amazon is using for warehousing.
Also, most smaller players cannot afford it because of economies of scale makes the first ten thousand holes way more expensive than the ten millionth.
If... and the result's dependent on the if... the worker saves at a high rate, i.e. dormitory and meals are free, and there really isn't a lot to do in these factory mini cities, and saves for 5 years, they'll have enough after those 5 years to pay outright for a new 40-50m2 ish apartment in many T3 cities, so that'll be by around age 23-25. A couple, double the size place, or a place further out in many T2s. It's not a high wage, but not a terrible wage as long as the benefits are included.
City tiers: https://en.m.wikipedia.org/wiki/Chinese_city_tier_system