The rules for autotrading and mining are different for ships assigned to stations. As near as I can tell a station trader or miner can always be assigned and work no matter how many stars thhey have and will be able to travel through a number of gates per deal/mining expedition based on either the station manager's management skill or the pilot's piloting skill, whichever is the greater. This means since it is easy enough to get pilots and managers to 2* using books readily available in the shops it is also easy enough to build a station who's traders and miners will have a two gate range of operation just using "off-the-shelf" rookie staff. Two sector radius of operations is easily sufficient for many a viable starter station.
Furthermore there is now a good reason to build e.g. a food factory. Practically all stations buy food regularly in small quantities so a food factory's traders are going to be very busy all the time on the basis of a two-sector radius of customers and therefore leveling up (relatively) fast automatically. Food factory = Pilot School, basically.